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b/api/openapi.yaml.html @@ -24,7 +24,7 @@ - + diff --git a/assets/js/2eb731bc.36c717d9.js b/assets/js/2eb731bc.36c717d9.js new file mode 100644 index 0000000000..d113645948 --- /dev/null +++ b/assets/js/2eb731bc.36c717d9.js @@ -0,0 +1 @@ +"use strict";(globalThis.webpackChunklangflow_docs=globalThis.webpackChunklangflow_docs||[]).push([[3536],{85202:(e,o,n)=>{n.r(o),n.d(o,{CH:()=>d,assets:()=>i,chCodeConfig:()=>p,contentTitle:()=>a,default:()=>u,frontMatter:()=>c,metadata:()=>t,toc:()=>h});const t=JSON.parse('{"id":"Develop/configuration-custom-database","title":"Configure an external PostgreSQL database","description":"Langflow\'s default database is SQLite, but you can configure Langflow to use PostgreSQL instead.","source":"@site/docs/Develop/configuration-custom-database.mdx","sourceDirName":"Develop","slug":"/configuration-custom-database","permalink":"/configuration-custom-database","draft":false,"unlisted":false,"tags":[],"version":"current","frontMatter":{"title":"Configure an 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This option is the most secure."]}),"\n",(0,s.jsx)(d.Code,{codeConfig:p,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"LANGFLOW_DATABASE_URL",props:{style:{color:"#C9D1D9"}}},{content:"=",props:{style:{color:"#FF7B72"}}},{content:'"postgresql://user@db.example.com:5432/dbname?sslmode=verify-full&sslcert=/path/to/client.crt&sslkey=/path/to/client.key&sslrootcert=/path/to/ca.crt"',props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(o.p,{children:["Do not use the Langflow environment variables ",(0,s.jsx)(o.a,{href:"/environment-variables#server",children:(0,s.jsx)(o.code,{children:"LANGFLOW_SSL_CERT_FILE"})})," and ",(0,s.jsx)(o.a,{href:"/environment-variables#server",children:(0,s.jsx)(o.code,{children:"LANGFLOW_SSL_KEY_FILE"})})," for your PostgreSQL certificates: these variables are for enabling HTTPS on the Langflow server, not for PostgreSQL database connections."]}),"\n",(0,s.jsxs)(o.p,{children:["For more on managing SSL certificates in PostgreSQL, see the ",(0,s.jsx)(o.a,{href:"https://www.postgresql.org/docs/9.1/ssl-tcp.html",children:"PostgreSQL documentation"}),"."]}),"\n"]}),"\n"]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsxs)(o.p,{children:["Save your changes, and then start Langflow with your ",(0,s.jsx)(o.code,{children:".env"})," file:"]}),"\n",(0,s.jsx)(d.Code,{codeConfig:p,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"uv ",props:{style:{color:"#FFA657"}}},{content:"run langflow run ",props:{style:{color:"#A5D6FF"}}},{content:"--env-file ",props:{style:{color:"#79C0FF"}}},{content:".env",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(o.p,{children:["For optional connection pooling and timeout settings, see ",(0,s.jsx)(o.a,{href:"/memory#configure-external-memory",children:"Configure external memory"}),"."]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsx)(o.p,{children:"In Langflow, run any flow to create traffic."}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsx)(o.p,{children:"Inspect your PostgreSQL database's tables and activity to verify that new tables and traffic were created after you ran a flow."}),"\n"]}),"\n"]}),"\n",(0,s.jsx)(o.h2,{id:"deploy-langflow-and-postgresql-containers-with-docker-composeyml",children:"Deploy Langflow and PostgreSQL containers with docker-compose.yml"}),"\n",(0,s.jsxs)(o.p,{children:["Launching Langflow and PostgreSQL containers in the same Docker network ensures proper connectivity between services.\nFor an example, see the ",(0,s.jsx)(o.a,{href:"https://github.com/langflow-ai/langflow/blob/main/docker_example/docker-compose.yml",children:(0,s.jsx)(o.code,{children:"docker-compose.yml"})})," file in the Langflow repository."]}),"\n",(0,s.jsxs)(o.p,{children:["The configuration in the example ",(0,s.jsx)(o.code,{children:"docker-compose.yml"})," also sets up persistent volumes for both Langflow and PostgreSQL data.\nPersistent volumes map directories inside of containers to storage on the host machine, so data persists through container restarts."]}),"\n",(0,s.jsxs)(o.p,{children:["Docker Compose creates an isolated network for all services defined in ",(0,s.jsx)(o.code,{children:"docker-compose.yml"}),". 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",props:{style:{color:"#C9D1D9"}}},{content:"LANGFLOW_CONFIG_DIR=${LANGFLOW_CONFIG_DIR}",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" - ",props:{style:{color:"#C9D1D9"}}},{content:"LANGFLOW_HOST=${LANGFLOW_HOST}",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" - ",props:{style:{color:"#C9D1D9"}}},{content:"PORT=7860",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" volumes",props:{style:{color:"#7EE787"}}},{content:":",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" - ",props:{style:{color:"#C9D1D9"}}},{content:"langflow-data-2:/app/langflow",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:"",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:"volumes",props:{style:{color:"#7EE787"}}},{content:":",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" langflow-postgres",props:{style:{color:"#7EE787"}}},{content:":",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" langflow-data-1",props:{style:{color:"#7EE787"}}},{content:":",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" langflow-data-2",props:{style:{color:"#7EE787"}}},{content:":",props:{style:{color:"#C9D1D9"}}}]}],lang:"yaml"},annotations:[]}]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsxs)(o.p,{children:["Deploy the file with ",(0,s.jsx)(o.code,{children:"docker-compose up"}),".\nYou can access the first Langflow instance at ",(0,s.jsx)(o.code,{children:"http://localhost:7860"}),", and the second Langflow instance at ",(0,s.jsx)(o.code,{children:"http://localhost:7861"}),"."]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsxs)(o.p,{children:["To confirm both instances are using the same database, run the ",(0,s.jsx)(o.code,{children:"docker exec"})," command to start ",(0,s.jsx)(o.code,{children:"psql"})," in your PostgreSQL container.\nYour container name may 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b/assets/js/2eb731bc.e11d632a.js deleted file mode 100644 index edb2b34897..0000000000 --- a/assets/js/2eb731bc.e11d632a.js +++ /dev/null @@ -1 +0,0 @@ -"use strict";(globalThis.webpackChunklangflow_docs=globalThis.webpackChunklangflow_docs||[]).push([[3536],{85202:(e,o,n)=>{n.r(o),n.d(o,{CH:()=>p,assets:()=>i,chCodeConfig:()=>d,contentTitle:()=>a,default:()=>u,frontMatter:()=>c,metadata:()=>t,toc:()=>h});const t=JSON.parse('{"id":"Develop/configuration-custom-database","title":"Configure an external PostgreSQL database","description":"Langflow\'s default database is SQLite, but you can configure Langflow to use PostgreSQL instead.","source":"@site/docs/Develop/configuration-custom-database.mdx","sourceDirName":"Develop","slug":"/configuration-custom-database","permalink":"/configuration-custom-database","draft":false,"unlisted":false,"tags":[],"version":"current","frontMatter":{"title":"Configure an external PostgreSQL database","slug":"/configuration-custom-database"},"sidebar":"docs","previous":{"title":"Use Session IDs","permalink":"/session-id"},"next":{"title":"Database guide for enterprise administrators","permalink":"/enterprise-database-guide"}}');var s=n(74848),r=n(28453),l=n(24754);const c={title:"Configure an external PostgreSQL database",slug:"/configuration-custom-database"},a=void 0,i={},p={annotations:l.hk,Code:l.Cy},d={staticMediaQuery:"not screen, (max-width: 768px)",lineNumbers:!0,showCopyButton:!0,themeName:"github-dark"},h=[{value:"Prerequisites",id:"prerequisites",level:2},{value:"Connect Langflow to a local PostgreSQL database",id:"connect-langflow-to-a-local-postgresql-database",level:2},{value:"Deploy Langflow and PostgreSQL containers with docker-compose.yml",id:"deploy-langflow-and-postgresql-containers-with-docker-composeyml",level:2},{value:"Deploy multiple Langflow instances with a shared PostgreSQL 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running, stop Langflow with ",(0,s.jsx)("kbd",{children:"Ctrl+C"}),"."]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsxs)(o.p,{children:["Find your PostgreSQL database's connection string in the format ",(0,s.jsx)(o.code,{children:"postgresql://user:password@host:port/dbname"}),"."]}),"\n",(0,s.jsx)(o.p,{children:"The hostname in your connection string depends on how you're running PostgreSQL:"}),"\n",(0,s.jsxs)(o.ul,{children:["\n",(0,s.jsxs)(o.li,{children:["If you're running PostgreSQL directly on your machine, use ",(0,s.jsx)(o.code,{children:"localhost"}),"."]}),"\n",(0,s.jsxs)(o.li,{children:["If you're running PostgreSQL in Docker Compose, use the service name, such as ",(0,s.jsx)(o.code,{children:"postgres"}),"."]}),"\n",(0,s.jsxs)(o.li,{children:["If you're running PostgreSQL in a separate Docker container with ",(0,s.jsx)(o.code,{children:"docker run"}),", use the container's IP address or network alias."]}),"\n",(0,s.jsx)(o.li,{children:"If you're running a cloud-hosted PostgreSQL, your provider will share your connection string, which includes a username and password."}),"\n"]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsxs)(o.p,{children:["Edit or create a Langflow ",(0,s.jsx)(o.code,{children:".env"})," file:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:d,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"touch .env",props:{}}]}],lang:"text"},annotations:[]}]}),"\n",(0,s.jsxs)(o.p,{children:["You can use the ",(0,s.jsx)(o.a,{href:"https://github.com/langflow-ai/langflow/blob/main/.env.example",children:(0,s.jsx)(o.code,{children:".env.example"})})," file in the Langflow repository as a template for your own ",(0,s.jsx)(o.code,{children:".env"})," file."]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsxs)(o.p,{children:["In your ",(0,s.jsx)(o.code,{children:".env"})," file, set ",(0,s.jsx)(o.code,{children:"LANGFLOW_DATABASE_URL"})," to your PostgreSQL connection string:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:d,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:'LANGFLOW_DATABASE_URL="postgresql://user:password@localhost:5432/dbname"',props:{}}]}],lang:"text"},annotations:[]}]}),"\n",(0,s.jsxs)(o.p,{children:["Langflow uses ",(0,s.jsx)(o.a,{href:"https://www.sqlalchemy.org/",children:"SQLAlchemy"})," with the ",(0,s.jsx)(o.a,{href:"https://www.psycopg.org/",children:"psycopg"})," driver to pass SSL parameters directly to the PostgreSQL connection. 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Add the certificate paths to your connection string:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:d,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"LANGFLOW_DATABASE_URL",props:{style:{color:"#C9D1D9"}}},{content:"=",props:{style:{color:"#FF7B72"}}},{content:'"postgresql://user@localhost:5432/dbname?sslmode=verify-ca&sslcert=/path/to/client.crt&sslkey=/path/to/client.key&sslrootcert=/path/to/ca.crt"',props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n"]}),"\n",(0,s.jsxs)(o.li,{children:["\n",(0,s.jsxs)(o.p,{children:[(0,s.jsx)(o.strong,{children:(0,s.jsx)(o.code,{children:"sslmode=verify-full"})}),": Requires SSL, verifies the server certificate, and checks the request hostname against the certificate hostname. The ",(0,s.jsx)(o.code,{children:"db.example.com"})," hostname in this example must match the server certificate's CN. 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environments",id:"no-tools-or-prompts-connected-on-mcp-servers-in-mixed-windowswsl-environments",level:3},{value:"Token length limit errors in Embedding Model components",id:"token-length-limit-errors-in-embedding-model-components",level:2},{value:"Document processing errors in Docker containers",id:"document-processing-errors-in-docker-containers",level:2},{value:"Custom components and integrations issues",id:"custom-components-and-integrations-issues",level:2},{value:"Custom components not appearing in the visual editor",id:"custom-components-not-appearing-in-the-visual-editor",level:3},{value:"See also",id:"see-also",level:2}];function m(e){const n={a:"a",admonition:"admonition",code:"code",h2:"h2",h3:"h3",li:"li",ol:"ol",p:"p",strong:"strong",ul:"ul",...(0,r.R)(),...e.components};return p||y("CH",!1),p.Code||y("CH.Code",!0),(0,s.jsxs)(s.Fragment,{children:[(0,s.jsx)("style",{dangerouslySetInnerHTML:{__html:'[data-ch-theme="github-dark"] { --ch-t-colorScheme: dark;--ch-t-foreground: 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other component categories and ",(0,s.jsx)(c.A,{name:"Blocks","aria-hidden":"true"})," ",(0,s.jsx)(n.a,{href:"/components-bundle-components",children:(0,s.jsx)(n.strong,{children:"Bundles"})}),"."]}),"\n",(0,s.jsxs)(n.li,{children:["Check ",(0,s.jsx)(n.a,{href:"/concepts-components#legacy-components",children:"legacy components"}),", which are hidden by default."]}),"\n",(0,s.jsxs)(n.li,{children:["Check the ",(0,s.jsx)(n.a,{href:"https://github.com/langflow-ai/langflow/releases/latest",children:"Changelog"})," for component changes in recent releases."]}),"\n",(0,s.jsx)(n.li,{children:"Make sure the component isn't already present in your flow if it is a single-use component."}),"\n"]}),"\n",(0,s.jsxs)(n.p,{children:["If you still cannot locate the component, see ",(0,s.jsx)(n.a,{href:"/contributing-github-issues",children:"Langflow GitHub Issues and Discussions"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"no-input-in-the-playground",children:"No input in the Playground"}),"\n",(0,s.jsxs)(n.p,{children:["If there is no message input field in the ",(0,s.jsx)(n.strong,{children:"Playground"}),", make sure your flow has a ",(0,s.jsxs)(n.a,{href:"/chat-input-and-output",children:[(0,s.jsx)(n.strong,{children:"Chat Input"})," component"]})," that is connected, directly or indirectly, to the ",(0,s.jsx)(n.strong,{children:"Input"})," port of a ",(0,s.jsx)(n.strong,{children:"Language Model"})," or ",(0,s.jsx)(n.strong,{children:"Agent"})," component."]}),"\n",(0,s.jsxs)(n.p,{children:["Because the ",(0,s.jsx)(n.strong,{children:"Playground"})," is designed for flows that use an LLM in a query-and-response format, such as chatbots and agents, a flow must have ",(0,s.jsx)(n.strong,{children:"Chat Input"}),", ",(0,s.jsx)(n.strong,{children:"Language Model"}),"/",(0,s.jsx)(n.strong,{children:"Agent"}),", and ",(0,s.jsx)(n.strong,{children:"Chat Output"})," components to be fully supported by the ",(0,s.jsx)(n.strong,{children:"Playground"})," chat interface."]}),"\n",(0,s.jsxs)(n.p,{children:["For more information, see ",(0,s.jsx)(n.a,{href:"/concepts-playground",children:"Test flows in the Playground"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"missing-key-no-key-found-or-invalid-api-key",children:"Missing key, no key found, or invalid API key"}),"\n",(0,s.jsx)(n.p,{children:"If you get an API key error when running a flow, try the following:"}),"\n",(0,s.jsxs)(n.ul,{children:["\n",(0,s.jsxs)(n.li,{children:["For all components that require credentials, make sure those components have a valid credential in the component's settings, such as the ",(0,s.jsx)(n.strong,{children:"API Key"})," field."]}),"\n",(0,s.jsxs)(n.li,{children:["If you store your credentials in ",(0,s.jsx)(n.a,{href:"/configuration-global-variables",children:"Langflow global variables"}),", make sure you selected the correct global variable and that the variable contains a valid credential."]}),"\n",(0,s.jsx)(n.li,{children:"Make sure the provided credentials are active, have the required permissions, and, if applicable, have sufficient funds in the account to execute the required action. For example, model providers require credits to use their LLMs."}),"\n"]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-installation-issues",children:"Langflow installation issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when installing Langflow."}),"\n",(0,s.jsx)(n.h3,{id:"langflow-installation-freezes-at-pip-dependency-resolution",children:"Langflow installation freezes at pip dependency resolution"}),"\n",(0,s.jsxs)(n.p,{children:["Installing Langflow OSS with ",(0,s.jsx)(n.code,{children:"pip install langflow"})," slowly fails with this error message:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"pip is looking at multiple versions of <> to determine which version is compatible with other requirements. This could take a while.",props:{}}]}],lang:"text"},annotations:[]}]}),"\n",(0,s.jsxs)(n.p,{children:["To work around this issue, install Langflow with ",(0,s.jsx)(n.code,{children:"uv"})," instead of ",(0,s.jsx)(n.code,{children:"pip"}),", as explained in ",(0,s.jsx)(n.a,{href:"/get-started-installation#install-and-run-the-langflow-oss-python-package",children:"Install and run the Langflow OSS Python package"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"linux-installation-fails-to-build-required-package",children:"Linux installation fails to build required package"}),"\n",(0,s.jsx)(n.p,{children:"When you try to install Langflow OSS on Linux, installation fails because of outdated or missing packages:"}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"Resolved ",props:{style:{color:"#FFA657"}}},{content:"455 ",props:{style:{color:"#79C0FF"}}},{content:"packages in ",props:{style:{color:"#A5D6FF"}}},{content:"18.92s",props:{style:{color:"#79C0FF"}}}]},{tokens:[{content:" \xd7 ",props:{style:{color:"#FFA657"}}},{content:"Failed to build `",props:{style:{color:"#A5D6FF"}}},{content:"webrtcvad",props:{style:{color:"#C9D1D9"}}},{content:"=",props:{style:{color:"#FF7B72"}}},{content:"=",props:{style:{color:"#A5D6FF"}}},{content:"2.0.10",props:{style:{color:"#79C0FF"}}},{content:"`",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" \u251c\u2500\u25b6",props:{style:{color:"#FFA657"}}},{content:" The build backend returned an error",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" \u2570\u2500\u25b6",props:{style:{color:"#FFA657"}}},{content:" Call to `setuptools.build_meta:__legacy__.build_wheel` ",props:{style:{color:"#A5D6FF"}}},{content:"failed",props:{style:{color:"#FFA657"}}},{content:" (exit status: ",props:{style:{color:"#A5D6FF"}}},{content:"1",props:{style:{color:"#79C0FF"}}},{content:")",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"To resolve this error, install the required build dependencies, and then retry the Langflow installation:"}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"sudo ",props:{style:{color:"#FFA657"}}},{content:"apt-get update",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:"sudo ",props:{style:{color:"#FFA657"}}},{content:"apt-get install build-essential python3-dev",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(n.p,{children:["If upgrading your packages doesn't fix the issue, install ",(0,s.jsx)(n.code,{children:"gcc"})," separately, and then retry the Langflow installation:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"sudo ",props:{style:{color:"#FFA657"}}},{content:"apt-get install gcc",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(n.h3,{id:"installation-failure-from-webrtcvad-package",children:["Installation failure from ",(0,s.jsx)(n.code,{children:"webrtcvad"})," package"]}),"\n",(0,s.jsxs)(n.p,{children:["If you experience an error from the ",(0,s.jsx)(n.code,{children:"webrtcvad"})," package, run ",(0,s.jsx)(n.code,{children:"uv pip install webrtcvad-wheels"})," in your virtual environment, and then retry the Langflow installation."]}),"\n",(0,s.jsx)(n.h3,{id:"protocol-buffers-protoc-required-for-intel-based-macs",children:"Protocol buffers (protoc) required for Intel-based Macs"}),"\n",(0,s.jsxs)(n.p,{children:["If you're installing Langflow on an Intel-based Mac, you may encounter installation errors if Protocol Buffers Compiler (",(0,s.jsx)(n.code,{children:"protoc"}),") is not installed."]}),"\n",(0,s.jsx)(n.p,{children:"This requirement doesn't apply to Apple Silicon Macs on ARM64."}),"\n",(0,s.jsxs)(n.p,{children:["To resolve this issue, install ",(0,s.jsx)(n.code,{children:"protoc"})," using ",(0,s.jsx)(n.code,{children:"brew install protobuf"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["For more information, including alternative installation methods, see the ",(0,s.jsx)(n.a,{href:"https://protobuf.dev/installation/",children:"Protocol buffers installation documentation"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"c-build-tools-required-for-langflow-desktop-on-windows",children:"C++ build tools required for Langflow Desktop on Windows"}),"\n",(0,s.jsxs)(n.p,{children:["Microsoft Windows installations of Langflow Desktop require a C++ compiler that may not be present on your system. If you receive a ",(0,s.jsx)(n.code,{children:"C++ Build Tools Required!"})," error, follow the on-screen prompt to install Microsoft C++ Build Tools, or ",(0,s.jsx)(n.a,{href:"https://visualstudio.microsoft.com/downloads/",children:"install Microsoft Visual Studio"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-startup-issues",children:"Langflow startup issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when attempting to start Langflow."}),"\n",(0,s.jsxs)(n.h3,{id:"no-langflow__main__-module",children:["No ",(0,s.jsx)(n.code,{children:"langflow.__main__"})," module"]}),"\n",(0,s.jsxs)(n.p,{children:["When you try to run Langflow with the command ",(0,s.jsx)(n.code,{children:"langflow run"}),", you encounter the following error:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:">",props:{style:{color:"#FF7B72"}}},{content:" No module named ",props:{style:{color:"#C9D1D9"}}},{content:"'langflow.__main__'",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"To resolve this issue, try the following:"}),"\n",(0,s.jsxs)(n.ol,{children:["\n",(0,s.jsxs)(n.li,{children:["Run ",(0,s.jsx)(n.code,{children:"uv run langflow run"})," instead of ",(0,s.jsx)(n.code,{children:"langflow run"}),"."]}),"\n",(0,s.jsxs)(n.li,{children:["If that doesn't work, reinstall the latest Langflow version with ",(0,s.jsx)(n.code,{children:"uv pip install langflow -U"}),"."]}),"\n",(0,s.jsxs)(n.li,{children:["If that doesn't work, reinstall Langflow and its dependencies with ",(0,s.jsx)(n.code,{children:"uv pip install langflow --pre -U --force-reinstall"}),"."]}),"\n"]}),"\n",(0,s.jsx)(n.h3,{id:"langflow-runtraceback",children:"Langflow runTraceback"}),"\n",(0,s.jsxs)(n.p,{children:["When you try to run Langflow using the command ",(0,s.jsx)(n.code,{children:"langflow run"}),", you encounter the following error:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:">",props:{style:{color:"#FF7B72"}}},{content:" langflow runTraceback (",props:{style:{color:"#C9D1D9"}}},{content:"most ",props:{style:{color:"#FFA657"}}},{content:"recent call last",props:{style:{color:"#A5D6FF"}}},{content:"): File ",props:{style:{color:"#C9D1D9"}}},{content:'".../langflow"',props:{style:{color:"#A5D6FF"}}},{content:", line 5, ",props:{style:{color:"#C9D1D9"}}},{content:"in <",props:{style:{color:"#FF7B72"}}},{content:"module",props:{style:{color:"#C9D1D9"}}},{content:">",props:{style:{color:"#FF7B72"}}},{content:" from langflow.__main__ import mainModuleNotFoundError: No module named ",props:{style:{color:"#C9D1D9"}}},{content:"'langflow.__main__'",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"There are two possible reasons for this error:"}),"\n",(0,s.jsxs)(n.ul,{children:["\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:[(0,s.jsx)(n.strong,{children:"Multiple Langflow installations"}),": You installed Langflow using ",(0,s.jsx)(n.code,{children:"pip install langflow"})," but you already had a previous version of Langflow installed in your system. In this case, you might be running the wrong executable."]}),"\n",(0,s.jsxs)(n.p,{children:["To solve this issue, run the correct executable by running ",(0,s.jsx)(n.code,{children:"python -m langflow run"})," instead of ",(0,s.jsx)(n.code,{children:"langflow run"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["If that doesn't work, try uninstalling and reinstalling Langflow with ",(0,s.jsx)(n.code,{children:"uv pip install langflow --pre -U"}),"."]}),"\n"]}),"\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:[(0,s.jsx)(n.strong,{children:"Version conflict during installation"}),": Some version conflicts might have occurred during the installation process. To resolve this issue, reinstall Langflow and its dependencies by running ",(0,s.jsx)(n.code,{children:"python -m pip install langflow --pre -U --force-reinstall"}),"."]}),"\n"]}),"\n"]}),"\n",(0,s.jsx)(n.h3,{id:"environment-variables-not-available-from-terminal",children:"Environment variables not available from terminal"}),"\n",(0,s.jsxs)(n.p,{children:["Environment variables set in your terminal aren't automatically available to GUI-based applications like Langflow Desktop when launched through the Finder or the Start Menu.\nTo set environment variables for Langflow Desktop, see ",(0,s.jsx)(n.a,{href:"/environment-variables#set-environment-variables-for-langflow-desktop",children:"Set environment variables for Langflow Desktop"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"access-langflow-desktop-startup-logs",children:"Access Langflow Desktop startup logs"}),"\n",(0,s.jsxs)(n.p,{children:["If you encounter issues with Langflow Desktop, you might need to ",(0,s.jsx)(n.a,{href:"/logging#desktop-logs",children:"access Langflow Desktop startup logs"})," for debugging."]}),"\n",(0,s.jsx)(n.h3,{id:"user-not-found-or-inactive-when-running-multiple-flows",children:"User not found or inactive when running multiple flows"}),"\n",(0,s.jsxs)(n.p,{children:["When running multiple local Langflow OSS instances on different ports, such as ",(0,s.jsx)(n.code,{children:"localhost:7860"})," and ",(0,s.jsx)(n.code,{children:"localhost:7861"}),", you might see authentication errors in the logs.\nFor example:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"[07/22/25 10:57:07] INFO 2025-07-22 10:57:07 - INFO - utils - User not found or inactive.",props:{}}]}],lang:"text"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"To resolve this error, use separate browser instances or browser profiles to access each Langflow instance."}),"\n",(0,s.jsx)(n.h3,{id:"package-is-not-installed",children:"Package is not installed"}),"\n",(0,s.jsx)(n.p,{children:"In Langflow OSS, you can follow the error message's instructions to install the missing dependency."}),"\n",(0,s.jsxs)(n.p,{children:["To manage dependencies in Langflow Desktop, see ",(0,s.jsx)(n.a,{href:"/install-custom-dependencies#langflow-desktop",children:"Install custom dependencies in Langflow Desktop"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"an-api-key-must-be-passed-as-query-or-header",children:"An API key must be passed as query or header"}),"\n",(0,s.jsxs)(n.p,{children:["The following error can occur when attempting to sign up on the Langflow sign in page: ",(0,s.jsx)(n.code,{children:"An API key must be passed as query or header"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["This means that ",(0,s.jsx)(n.code,{children:"LANGFLOW_AUTO_LOGIN"})," is set to ",(0,s.jsx)(n.code,{children:"false"}),", and only superusers can create and activate non-superuser accounts.\nTherefore, you are locked out of this Langflow instance."]}),"\n",(0,s.jsx)(n.p,{children:"If you aren't an administrator, then a superuser must create and activate a non-superuser account before you can sign in."}),"\n",(0,s.jsxs)(n.p,{children:["If you are the administrator, sign in with a superuser account, or restart Langflow with ",(0,s.jsx)(n.code,{children:"LANGFLOW_AUTO_LOGIN=true"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["For more information, see ",(0,s.jsx)(n.a,{href:"/api-keys-and-authentication#start-a-langflow-server-with-authentication-enabled",children:"Start Langflow Server with authentication enabled"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-upgrade-issues",children:"Langflow upgrade issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when upgrading your Langflow version."}),"\n",(0,s.jsxs)(n.p,{children:["For information about managing Langflow versions, see ",(0,s.jsx)(n.a,{href:"/get-started-installation",children:"Install Langflow"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"something-went-wrong-running-migrations",children:"Something went wrong running migrations"}),"\n",(0,s.jsxs)(n.p,{children:["The following error can occur during Langflow upgrades when the new version can't override ",(0,s.jsx)(n.code,{children:"langflow-pre.db"})," in the Langflow cache folder:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:">",props:{style:{color:"#FF7B72"}}},{content:" Something went wrong running migrations. Please, run ",props:{style:{color:"#C9D1D9"}}},{content:"'langflow migration --fix'",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(n.p,{children:["To resolve this error, clear the cache by deleting the contents of your Langflow cache folder.\nThe filepath depends on your operating system, installation type, and configuration options.\nFor more information and default filepaths, see ",(0,s.jsx)(n.a,{href:"/memory",children:"Memory management options"}),"."]}),"\n",(0,s.jsx)(n.admonition,{type:"danger",children:(0,s.jsx)(n.p,{children:"Clearing the cache erases your settings.\nIf you want to retain your settings files, create a backup of those files before clearing the cache folder."})}),"\n",(0,s.jsx)(n.h3,{id:"langflow-desktop-says-it-is-running-the-latest-version-but-it-is-actually-behind",children:"Langflow Desktop says it is running the latest version, but it is actually behind"}),"\n",(0,s.jsx)(n.p,{children:"If you are running Langflow Desktop version 1.4.2 or earlier, the UI might incorrectly report that you are on the latest version when a newer version is available."}),"\n",(0,s.jsx)(n.p,{children:"This happens because the automatic update feature in the UI was introduced in version 1.4.2.\nEarlier versions can't automatically detect or apply updates."}),"\n",(0,s.jsxs)(n.p,{children:["To resolve this issue, uninstall Langflow Desktop, and then ",(0,s.jsx)(n.a,{href:"https://langflow.org/desktop",children:"download and install the latest version of Langflow Desktop"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"422-error-when-freezing-components-after-upgrading-pydanticfastapi-dependencies",children:"422 error when freezing components after upgrading Pydantic/FastAPI dependencies"}),"\n",(0,s.jsx)(n.p,{children:"If you locally upgrade your Pydantic and FastAPI dependencies, you may encounter a 422 error when trying to freeze components."}),"\n",(0,s.jsx)(n.p,{children:"This error occurs due to changes in how request bodies are handled in newer versions of these dependencies."}),"\n",(0,s.jsx)(n.p,{children:"If you're experiencing this issue, update your Langflow installation to version 1.6.5 or later, which includes a fix for this issue."}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"uv ",props:{style:{color:"#FFA657"}}},{content:"pip install langflow ",props:{style:{color:"#A5D6FF"}}},{content:"-U",props:{style:{color:"#79C0FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-uninstall-issues",children:"Langflow uninstall issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when uninstalling Langflow."}),"\n",(0,s.jsx)(n.h3,{id:"dot-directory-isnt-deleted-when-uninstalling-langflow-desktop-on-macos",children:"Dot directory isn't deleted when uninstalling Langflow Desktop on macOS"}),"\n",(0,s.jsxs)(n.p,{children:["On macOS, uninstalling Langflow Desktop deletes the ",(0,s.jsx)(n.code,{children:".app"})," file but doesn't delete files in ",(0,s.jsx)(n.code,{children:"~/.langflow"}),", which includes files generated during usage like cache and settings."]}),"\n",(0,s.jsx)(n.p,{children:"If you reinstall Langflow Desktop, it starts with the existing data from the previous installation."}),"\n",(0,s.jsxs)(n.p,{children:["To fully remove a Langflow Desktop macOS installation, you must also delete ",(0,s.jsx)(n.code,{children:"~/.langflow"}),":"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"rm ",props:{style:{color:"#FFA657"}}},{content:"-rf ",props:{style:{color:"#79C0FF"}}},{content:".langflow",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.h2,{id:"mcp",children:"Langflow MCP issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when using Langflow as an MCP server or client."}),"\n",(0,s.jsx)(n.h3,{id:"claude-for-desktop-doesnt-use-mcp-server-tools-correctly",children:"Claude for Desktop doesn't use MCP server tools correctly"}),"\n",(0,s.jsxs)(n.p,{children:["If Claude for Desktop doesn't use your server's tools correctly, try explicitly defining the path to your local ",(0,s.jsx)(n.code,{children:"uvx"})," or ",(0,s.jsx)(n.code,{children:"npx"})," executable file in the ",(0,s.jsx)(n.code,{children:"claude_desktop_config.json"})," configuration file:"]}),"\n",(0,s.jsxs)(n.ol,{children:["\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:["To find your ",(0,s.jsx)(n.code,{children:"uvx"})," path, run ",(0,s.jsx)(n.code,{children:"which uvx"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["To find your ",(0,s.jsx)(n.code,{children:"npx"})," path, run ",(0,s.jsx)(n.code,{children:"which npx"}),"."]}),"\n"]}),"\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:["In your ",(0,s.jsx)(n.code,{children:"claude_desktop_config.json"})," file, add the path to your Langflow MCP server configuration, as shown in the following examples."]}),"\n",(0,s.jsxs)(l.A,{children:[(0,s.jsx)(a.A,{value:"uvx",label:"uvx",default:!0,children:(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"{",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "mcpServers"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "PROJECT_NAME"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "command"',props:{style:{color:"#7EE787"}}},{content:": ",props:{style:{color:"#C9D1D9"}}},{content:'"PATH_TO_UVX"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "args"',props:{style:{color:"#7EE787"}}},{content:": [",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "mcp-proxy"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "http://LANGFLOW_SERVER_ADDRESS/api/v1/mcp/project/PROJECT_ID/streamable"',props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" ]",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" }",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" }",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:"}",props:{style:{color:"#C9D1D9"}}}]}],lang:"json"},annotations:[]}]})}),(0,s.jsx)(a.A,{value:"npx",label:"npx",children:(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"{",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "mcpServers"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "PROJECT_NAME"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "command"',props:{style:{color:"#7EE787"}}},{content:": ",props:{style:{color:"#C9D1D9"}}},{content:'"PATH_TO_NPX"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "args"',props:{style:{color:"#7EE787"}}},{content:": [",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "-y"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "supergateway"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "--sse"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "http://LANGFLOW_SERVER_ADDRESS/api/v1/mcp/project/PROJECT_ID/streamable"',props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" ]",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" }",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" }",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:"}",props:{style:{color:"#C9D1D9"}}}]}],lang:"json"},annotations:[]}]})})]}),"\n"]}),"\n"]}),"\n",(0,s.jsx)(n.h3,{id:"mcp-browser-based-flows-dont-open-a-browser-on-windows",children:"MCP browser-based flows don't open a browser on Windows"}),"\n",(0,s.jsx)(n.p,{children:"This is a known issue when using MCP Tools with browser navigation actions, such as Playwright, on Windows: The agent can execute the tool successfully but the browser tab or window doesn't open."}),"\n",(0,s.jsx)(n.p,{children:"This issue occurs because the MCP server runs from a Python process, which prevents it from opening browser windows in WSL or Windows."}),"\n",(0,s.jsxs)(n.p,{children:["To work around this issue, use the standalone MCP server approach documented in the ",(0,s.jsx)(n.a,{href:"https://github.com/microsoft/playwright-mcp?tab=readme-ov-file#standalone-mcp-server",children:"Playwright MCP repository"}),".\nAfter the server is up and running, you can add it as an HTTP/SSE server in Langflow."]}),"\n",(0,s.jsx)(n.p,{children:"For other browser navigation tools, see the provider's documentation for specific troubleshooting guidance."}),"\n",(0,s.jsx)(n.h3,{id:"no-tools-or-prompts-connected-on-mcp-servers-in-mixed-windowswsl-environments",children:'"No tools or prompts connected" on MCP servers in mixed Windows/WSL environments'}),"\n",(0,s.jsx)(n.p,{children:'If you encounter "No tools or prompts connected" errors or connection failures when using Langflow Desktop as an MCP server with clients running in different environments, such as Langflow on a Windows host and an MCP client in WSL, this is due to network isolation between Windows and WSL environments.'}),"\n",(0,s.jsxs)(n.p,{children:["WSL cannot directly access Windows localhost services, and Langflow running on a Windows host is not accessible from WSL clients at ",(0,s.jsx)(n.code,{children:"localhost:7860"}),"."]}),"\n",(0,s.jsx)(n.p,{children:"To work around this issue, run the server and host in the same operating environment."}),"\n",(0,s.jsxs)(n.p,{children:["Alternatively, configure Langflow Desktop to accept connections from WSL at the default Windows IP address of ",(0,s.jsx)(n.code,{children:"10.255.255.254:7860"})," instead of ",(0,s.jsx)(n.code,{children:"localhost"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"token-length-limit-errors-in-embedding-model-components",children:"Token length limit errors in Embedding Model components"}),"\n",(0,s.jsxs)(n.p,{children:["Token length errors can happen if your chunking strategy doesn't align with your embedding model's tokenization limits.\nFor more information, see ",(0,s.jsx)(n.a,{href:"/split-text#chunk-size",children:"Tokenization errors due to chunk size"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"document-processing-errors-in-docker-containers",children:"Document processing errors in Docker containers"}),"\n",(0,s.jsxs)(n.p,{children:["If you're running Langflow in a Docker container, you might encounter errors when using components that handle files or images, such as the ",(0,s.jsxs)(n.a,{href:"/read-file",children:[(0,s.jsx)(n.strong,{children:"Read File"})," component"]})," or ",(0,s.jsxs)(n.a,{href:"/bundles-docling",children:[(0,s.jsx)(n.strong,{children:"Docling"})," components"]}),". To resolve these errors, you might need to install additional system dependencies."]}),"\n",(0,s.jsx)(n.p,{children:"When running Langflow in a Linux-based Docker container, Docling requires system libraries that aren't included in the base Docker image. 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active, have the required permissions, and, if applicable, have sufficient funds in the account to execute the required action. For example, model providers require credits to use their LLMs."}),"\n"]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-installation-issues",children:"Langflow installation issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when installing Langflow."}),"\n",(0,s.jsx)(n.h3,{id:"langflow-installation-freezes-at-pip-dependency-resolution",children:"Langflow installation freezes at pip dependency resolution"}),"\n",(0,s.jsxs)(n.p,{children:["Installing Langflow OSS with ",(0,s.jsx)(n.code,{children:"pip install langflow"})," slowly fails with this error message:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"pip is looking at multiple versions of <> to determine which version is compatible with other requirements. This could take a while.",props:{}}]}],lang:"text"},annotations:[]}]}),"\n",(0,s.jsxs)(n.p,{children:["To work around this issue, install Langflow with ",(0,s.jsx)(n.code,{children:"uv"})," instead of ",(0,s.jsx)(n.code,{children:"pip"}),", as explained in ",(0,s.jsx)(n.a,{href:"/get-started-installation#install-and-run-the-langflow-oss-python-package",children:"Install and run the Langflow OSS Python package"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"linux-installation-fails-to-build-required-package",children:"Linux installation fails to build required package"}),"\n",(0,s.jsx)(n.p,{children:"When you try to install Langflow OSS on Linux, installation fails because of outdated or missing packages:"}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"Resolved ",props:{style:{color:"#FFA657"}}},{content:"455 ",props:{style:{color:"#79C0FF"}}},{content:"packages in ",props:{style:{color:"#A5D6FF"}}},{content:"18.92s",props:{style:{color:"#79C0FF"}}}]},{tokens:[{content:" \xd7 ",props:{style:{color:"#FFA657"}}},{content:"Failed to build `",props:{style:{color:"#A5D6FF"}}},{content:"webrtcvad",props:{style:{color:"#C9D1D9"}}},{content:"=",props:{style:{color:"#FF7B72"}}},{content:"=",props:{style:{color:"#A5D6FF"}}},{content:"2.0.10",props:{style:{color:"#79C0FF"}}},{content:"`",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" \u251c\u2500\u25b6",props:{style:{color:"#FFA657"}}},{content:" The build backend returned an error",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" \u2570\u2500\u25b6",props:{style:{color:"#FFA657"}}},{content:" Call to `setuptools.build_meta:__legacy__.build_wheel` ",props:{style:{color:"#A5D6FF"}}},{content:"failed",props:{style:{color:"#FFA657"}}},{content:" (exit status: ",props:{style:{color:"#A5D6FF"}}},{content:"1",props:{style:{color:"#79C0FF"}}},{content:")",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"To resolve this error, install the required build dependencies, and then retry the Langflow installation:"}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"sudo ",props:{style:{color:"#FFA657"}}},{content:"apt-get update",props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:"sudo ",props:{style:{color:"#FFA657"}}},{content:"apt-get install build-essential python3-dev",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(n.p,{children:["If upgrading your packages doesn't fix the issue, install ",(0,s.jsx)(n.code,{children:"gcc"})," separately, and then retry the Langflow installation:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"sudo ",props:{style:{color:"#FFA657"}}},{content:"apt-get install gcc",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(n.h3,{id:"installation-failure-from-webrtcvad-package",children:["Installation failure from ",(0,s.jsx)(n.code,{children:"webrtcvad"})," package"]}),"\n",(0,s.jsxs)(n.p,{children:["If you experience an error from the ",(0,s.jsx)(n.code,{children:"webrtcvad"})," package, run ",(0,s.jsx)(n.code,{children:"uv pip install webrtcvad-wheels"})," in your virtual environment, and then retry the Langflow installation."]}),"\n",(0,s.jsx)(n.h3,{id:"protocol-buffers-protoc-required-for-intel-based-macs",children:"Protocol buffers (protoc) required for Intel-based Macs"}),"\n",(0,s.jsxs)(n.p,{children:["If you're installing Langflow on an Intel-based Mac, you may encounter installation errors if Protocol Buffers Compiler (",(0,s.jsx)(n.code,{children:"protoc"}),") is not installed."]}),"\n",(0,s.jsx)(n.p,{children:"This requirement doesn't apply to Apple Silicon Macs on ARM64."}),"\n",(0,s.jsxs)(n.p,{children:["To resolve this issue, install ",(0,s.jsx)(n.code,{children:"protoc"})," using ",(0,s.jsx)(n.code,{children:"brew install protobuf"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["For more information, including alternative installation methods, see the ",(0,s.jsx)(n.a,{href:"https://protobuf.dev/installation/",children:"Protocol buffers installation documentation"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"c-build-tools-required-for-langflow-desktop-on-windows",children:"C++ build tools required for Langflow Desktop on Windows"}),"\n",(0,s.jsxs)(n.p,{children:["Microsoft Windows installations of Langflow Desktop require a C++ compiler that may not be present on your system. If you receive a ",(0,s.jsx)(n.code,{children:"C++ Build Tools Required!"})," error, follow the on-screen prompt to install Microsoft C++ Build Tools, or ",(0,s.jsx)(n.a,{href:"https://visualstudio.microsoft.com/downloads/",children:"install Microsoft Visual Studio"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-startup-issues",children:"Langflow startup issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when attempting to start Langflow."}),"\n",(0,s.jsxs)(n.h3,{id:"no-langflow__main__-module",children:["No ",(0,s.jsx)(n.code,{children:"langflow.__main__"})," module"]}),"\n",(0,s.jsxs)(n.p,{children:["When you try to run Langflow with the command ",(0,s.jsx)(n.code,{children:"langflow run"}),", you encounter the following error:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:">",props:{style:{color:"#FF7B72"}}},{content:" No module named ",props:{style:{color:"#C9D1D9"}}},{content:"'langflow.__main__'",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"To resolve this issue, try the following:"}),"\n",(0,s.jsxs)(n.ol,{children:["\n",(0,s.jsxs)(n.li,{children:["Run ",(0,s.jsx)(n.code,{children:"uv run langflow run"})," instead of ",(0,s.jsx)(n.code,{children:"langflow run"}),"."]}),"\n",(0,s.jsxs)(n.li,{children:["If that doesn't work, reinstall the latest Langflow version with ",(0,s.jsx)(n.code,{children:"uv pip install langflow -U"}),"."]}),"\n",(0,s.jsxs)(n.li,{children:["If that doesn't work, reinstall Langflow and its dependencies with ",(0,s.jsx)(n.code,{children:"uv pip install langflow --pre -U --force-reinstall"}),"."]}),"\n"]}),"\n",(0,s.jsx)(n.h3,{id:"langflow-runtraceback",children:"Langflow runTraceback"}),"\n",(0,s.jsxs)(n.p,{children:["When you try to run Langflow using the command ",(0,s.jsx)(n.code,{children:"langflow run"}),", you encounter the following error:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:">",props:{style:{color:"#FF7B72"}}},{content:" langflow runTraceback (",props:{style:{color:"#C9D1D9"}}},{content:"most ",props:{style:{color:"#FFA657"}}},{content:"recent call last",props:{style:{color:"#A5D6FF"}}},{content:"): File ",props:{style:{color:"#C9D1D9"}}},{content:'".../langflow"',props:{style:{color:"#A5D6FF"}}},{content:", line 5, ",props:{style:{color:"#C9D1D9"}}},{content:"in <",props:{style:{color:"#FF7B72"}}},{content:"module",props:{style:{color:"#C9D1D9"}}},{content:">",props:{style:{color:"#FF7B72"}}},{content:" from langflow.__main__ import mainModuleNotFoundError: No module named ",props:{style:{color:"#C9D1D9"}}},{content:"'langflow.__main__'",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"There are two possible reasons for this error:"}),"\n",(0,s.jsxs)(n.ul,{children:["\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:[(0,s.jsx)(n.strong,{children:"Multiple Langflow installations"}),": You installed Langflow using ",(0,s.jsx)(n.code,{children:"pip install langflow"})," but you already had a previous version of Langflow installed in your system. In this case, you might be running the wrong executable."]}),"\n",(0,s.jsxs)(n.p,{children:["To solve this issue, run the correct executable by running ",(0,s.jsx)(n.code,{children:"python -m langflow run"})," instead of ",(0,s.jsx)(n.code,{children:"langflow run"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["If that doesn't work, try uninstalling and reinstalling Langflow with ",(0,s.jsx)(n.code,{children:"uv pip install langflow --pre -U"}),"."]}),"\n"]}),"\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:[(0,s.jsx)(n.strong,{children:"Version conflict during installation"}),": Some version conflicts might have occurred during the installation process. To resolve this issue, reinstall Langflow and its dependencies by running ",(0,s.jsx)(n.code,{children:"python -m pip install langflow --pre -U --force-reinstall"}),"."]}),"\n"]}),"\n"]}),"\n",(0,s.jsx)(n.h3,{id:"environment-variables-not-available-from-terminal",children:"Environment variables not available from terminal"}),"\n",(0,s.jsxs)(n.p,{children:["Environment variables set in your terminal aren't automatically available to GUI-based applications like Langflow Desktop when launched through the Finder or the Start Menu.\nTo set environment variables for Langflow Desktop, see ",(0,s.jsx)(n.a,{href:"/environment-variables#set-environment-variables-for-langflow-desktop",children:"Set environment variables for Langflow Desktop"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"access-langflow-desktop-startup-logs",children:"Access Langflow Desktop startup logs"}),"\n",(0,s.jsxs)(n.p,{children:["If you encounter issues with Langflow Desktop, you might need to ",(0,s.jsx)(n.a,{href:"/logging#desktop-logs",children:"access Langflow Desktop startup logs"})," for debugging."]}),"\n",(0,s.jsx)(n.h3,{id:"user-not-found-or-inactive-when-running-multiple-flows",children:"User not found or inactive when running multiple flows"}),"\n",(0,s.jsxs)(n.p,{children:["When running multiple local Langflow OSS instances on different ports, such as ",(0,s.jsx)(n.code,{children:"localhost:7860"})," and ",(0,s.jsx)(n.code,{children:"localhost:7861"}),", you might see authentication errors in the logs.\nFor example:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"[07/22/25 10:57:07] INFO 2025-07-22 10:57:07 - INFO - utils - User not found or inactive.",props:{}}]}],lang:"text"},annotations:[]}]}),"\n",(0,s.jsx)(n.p,{children:"To resolve this error, use separate browser instances or browser profiles to access each Langflow instance."}),"\n",(0,s.jsx)(n.h3,{id:"package-is-not-installed",children:"Package is not installed"}),"\n",(0,s.jsx)(n.p,{children:"In Langflow OSS, you can follow the error message's instructions to install the missing dependency."}),"\n",(0,s.jsxs)(n.p,{children:["To manage dependencies in Langflow Desktop, see ",(0,s.jsx)(n.a,{href:"/install-custom-dependencies#langflow-desktop",children:"Install custom dependencies in Langflow Desktop"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"postgresql-asyncpg-driver-compatibility-issue",children:"PostgreSQL asyncpg driver compatibility issue"}),"\n",(0,s.jsx)(n.p,{children:"The following error can occur when initializing Langflow with a PostgreSQL database:"}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"sqlalchemy.exc.DBAPIError: (sqlalchemy.dialects.postgresql.asyncpg.Error) : invalid input for query argument $7: datetime.datetime(2025, 10, 31, 14, 8, 5... (can't subtract offset-naive and offset-aware datetimes)",props:{}}]}],lang:"text"},annotations:[]}]}),"\n",(0,s.jsxs)(n.p,{children:["This error occurs because ",(0,s.jsx)(n.code,{children:"asyncpg"})," has stricter timezone handling than ",(0,s.jsx)(n.code,{children:"psycopg2"}),", and is not fully compatible with Langflow's current database schema."]}),"\n",(0,s.jsxs)(n.p,{children:["To resolve this issue, remove ",(0,s.jsx)(n.code,{children:"asyncpg"})," from your installation and use ",(0,s.jsx)(n.code,{children:"psycopg2"})," instead."]}),"\n",(0,s.jsx)(n.h3,{id:"an-api-key-must-be-passed-as-query-or-header",children:"An API key must be passed as query or header"}),"\n",(0,s.jsxs)(n.p,{children:["The following error can occur when attempting to sign up on the Langflow sign in page: ",(0,s.jsx)(n.code,{children:"An API key must be passed as query or header"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["This means that ",(0,s.jsx)(n.code,{children:"LANGFLOW_AUTO_LOGIN"})," is set to ",(0,s.jsx)(n.code,{children:"false"}),", and only superusers can create and activate non-superuser accounts.\nTherefore, you are locked out of this Langflow instance."]}),"\n",(0,s.jsx)(n.p,{children:"If you aren't an administrator, then a superuser must create and activate a non-superuser account before you can sign in."}),"\n",(0,s.jsxs)(n.p,{children:["If you are the administrator, sign in with a superuser account, or restart Langflow with ",(0,s.jsx)(n.code,{children:"LANGFLOW_AUTO_LOGIN=true"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["For more information, see ",(0,s.jsx)(n.a,{href:"/api-keys-and-authentication#start-a-langflow-server-with-authentication-enabled",children:"Start Langflow Server with authentication enabled"}),"."]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-upgrade-issues",children:"Langflow upgrade issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when upgrading your Langflow version."}),"\n",(0,s.jsxs)(n.p,{children:["For information about managing Langflow versions, see ",(0,s.jsx)(n.a,{href:"/get-started-installation",children:"Install Langflow"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"something-went-wrong-running-migrations",children:"Something went wrong running migrations"}),"\n",(0,s.jsxs)(n.p,{children:["The following error can occur during Langflow upgrades when the new version can't override ",(0,s.jsx)(n.code,{children:"langflow-pre.db"})," in the Langflow cache folder:"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:">",props:{style:{color:"#FF7B72"}}},{content:" Something went wrong running migrations. Please, run ",props:{style:{color:"#C9D1D9"}}},{content:"'langflow migration --fix'",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsxs)(n.p,{children:["To resolve this error, clear the cache by deleting the contents of your Langflow cache folder.\nThe filepath depends on your operating system, installation type, and configuration options.\nFor more information and default filepaths, see ",(0,s.jsx)(n.a,{href:"/memory",children:"Memory management options"}),"."]}),"\n",(0,s.jsx)(n.admonition,{type:"danger",children:(0,s.jsx)(n.p,{children:"Clearing the cache erases your settings.\nIf you want to retain your settings files, create a backup of those files before clearing the cache folder."})}),"\n",(0,s.jsx)(n.h3,{id:"langflow-desktop-says-it-is-running-the-latest-version-but-it-is-actually-behind",children:"Langflow Desktop says it is running the latest version, but it is actually behind"}),"\n",(0,s.jsx)(n.p,{children:"If you are running Langflow Desktop version 1.4.2 or earlier, the UI might incorrectly report that you are on the latest version when a newer version is available."}),"\n",(0,s.jsx)(n.p,{children:"This happens because the automatic update feature in the UI was introduced in version 1.4.2.\nEarlier versions can't automatically detect or apply updates."}),"\n",(0,s.jsxs)(n.p,{children:["To resolve this issue, uninstall Langflow Desktop, and then ",(0,s.jsx)(n.a,{href:"https://langflow.org/desktop",children:"download and install the latest version of Langflow Desktop"}),"."]}),"\n",(0,s.jsx)(n.h3,{id:"422-error-when-freezing-components-after-upgrading-pydanticfastapi-dependencies",children:"422 error when freezing components after upgrading Pydantic/FastAPI dependencies"}),"\n",(0,s.jsx)(n.p,{children:"If you locally upgrade your Pydantic and FastAPI dependencies, you may encounter a 422 error when trying to freeze components."}),"\n",(0,s.jsx)(n.p,{children:"This error occurs due to changes in how request bodies are handled in newer versions of these dependencies."}),"\n",(0,s.jsx)(n.p,{children:"If you're experiencing this issue, update your Langflow installation to version 1.6.5 or later, which includes a fix for this issue."}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"uv ",props:{style:{color:"#FFA657"}}},{content:"pip install langflow ",props:{style:{color:"#A5D6FF"}}},{content:"-U",props:{style:{color:"#79C0FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.h2,{id:"langflow-uninstall-issues",children:"Langflow uninstall issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when uninstalling Langflow."}),"\n",(0,s.jsx)(n.h3,{id:"dot-directory-isnt-deleted-when-uninstalling-langflow-desktop-on-macos",children:"Dot directory isn't deleted when uninstalling Langflow Desktop on macOS"}),"\n",(0,s.jsxs)(n.p,{children:["On macOS, uninstalling Langflow Desktop deletes the ",(0,s.jsx)(n.code,{children:".app"})," file but doesn't delete files in ",(0,s.jsx)(n.code,{children:"~/.langflow"}),", which includes files generated during usage like cache and settings."]}),"\n",(0,s.jsx)(n.p,{children:"If you reinstall Langflow Desktop, it starts with the existing data from the previous installation."}),"\n",(0,s.jsxs)(n.p,{children:["To fully remove a Langflow Desktop macOS installation, you must also delete ",(0,s.jsx)(n.code,{children:"~/.langflow"}),":"]}),"\n",(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"rm ",props:{style:{color:"#FFA657"}}},{content:"-rf ",props:{style:{color:"#79C0FF"}}},{content:".langflow",props:{style:{color:"#A5D6FF"}}}]}],lang:"bash"},annotations:[]}]}),"\n",(0,s.jsx)(n.h2,{id:"mcp",children:"Langflow MCP issues"}),"\n",(0,s.jsx)(n.p,{children:"The following issues can occur when using Langflow as an MCP server or client."}),"\n",(0,s.jsx)(n.h3,{id:"claude-for-desktop-doesnt-use-mcp-server-tools-correctly",children:"Claude for Desktop doesn't use MCP server tools correctly"}),"\n",(0,s.jsxs)(n.p,{children:["If Claude for Desktop doesn't use your server's tools correctly, try explicitly defining the path to your local ",(0,s.jsx)(n.code,{children:"uvx"})," or ",(0,s.jsx)(n.code,{children:"npx"})," executable file in the ",(0,s.jsx)(n.code,{children:"claude_desktop_config.json"})," configuration file:"]}),"\n",(0,s.jsxs)(n.ol,{children:["\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:["To find your ",(0,s.jsx)(n.code,{children:"uvx"})," path, run ",(0,s.jsx)(n.code,{children:"which uvx"}),"."]}),"\n",(0,s.jsxs)(n.p,{children:["To find your ",(0,s.jsx)(n.code,{children:"npx"})," path, run ",(0,s.jsx)(n.code,{children:"which npx"}),"."]}),"\n"]}),"\n",(0,s.jsxs)(n.li,{children:["\n",(0,s.jsxs)(n.p,{children:["In your ",(0,s.jsx)(n.code,{children:"claude_desktop_config.json"})," file, add the path to your Langflow MCP server configuration, as shown in the following examples."]}),"\n",(0,s.jsxs)(l.A,{children:[(0,s.jsx)(a.A,{value:"uvx",label:"uvx",default:!0,children:(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"{",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "mcpServers"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "PROJECT_NAME"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "command"',props:{style:{color:"#7EE787"}}},{content:": ",props:{style:{color:"#C9D1D9"}}},{content:'"PATH_TO_UVX"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "args"',props:{style:{color:"#7EE787"}}},{content:": [",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "mcp-proxy"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "http://LANGFLOW_SERVER_ADDRESS/api/v1/mcp/project/PROJECT_ID/streamable"',props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" ]",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" }",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" }",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:"}",props:{style:{color:"#C9D1D9"}}}]}],lang:"json"},annotations:[]}]})}),(0,s.jsx)(a.A,{value:"npx",label:"npx",children:(0,s.jsx)(p.Code,{codeConfig:g,northPanel:{tabs:[""],active:"",heightRatio:1},files:[{name:"",focus:"",code:{lines:[{tokens:[{content:"{",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "mcpServers"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "PROJECT_NAME"',props:{style:{color:"#7EE787"}}},{content:": {",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "command"',props:{style:{color:"#7EE787"}}},{content:": ",props:{style:{color:"#C9D1D9"}}},{content:'"PATH_TO_NPX"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "args"',props:{style:{color:"#7EE787"}}},{content:": [",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "-y"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "supergateway"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "--sse"',props:{style:{color:"#A5D6FF"}}},{content:",",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:' "http://LANGFLOW_SERVER_ADDRESS/api/v1/mcp/project/PROJECT_ID/streamable"',props:{style:{color:"#A5D6FF"}}}]},{tokens:[{content:" ]",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" }",props:{style:{color:"#C9D1D9"}}}]},{tokens:[{content:" 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--git a/components-agents.html b/components-agents.html index 3f46219579..e64cb9d9eb 100644 --- a/components-agents.html +++ b/components-agents.html @@ -24,7 +24,7 @@ - + diff --git a/components-bundle-components.html b/components-bundle-components.html index f113051fbc..a3aa436b50 100644 --- a/components-bundle-components.html +++ b/components-bundle-components.html @@ -24,7 +24,7 @@ - + diff --git a/components-custom-components.html b/components-custom-components.html index de8657db51..125c1055d1 100644 --- a/components-custom-components.html +++ b/components-custom-components.html @@ -24,7 +24,7 @@ - + diff --git a/components-embedding-models.html b/components-embedding-models.html index 62cfcb4e11..7137b78500 100644 --- a/components-embedding-models.html +++ b/components-embedding-models.html @@ -24,7 +24,7 @@ - + diff --git a/components-models.html b/components-models.html index 9ea576bece..562df683f3 100644 --- a/components-models.html +++ b/components-models.html @@ -24,7 +24,7 @@ - + diff --git a/components-prompts.html b/components-prompts.html index 19f30cb2fd..90d5381040 100644 --- a/components-prompts.html +++ b/components-prompts.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-components.html b/concepts-components.html index d0799c8347..2a54552c41 100644 --- a/concepts-components.html +++ b/concepts-components.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-file-management.html b/concepts-file-management.html index 5eb3e837ee..13129d2d9c 100644 --- a/concepts-file-management.html +++ b/concepts-file-management.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-flows-import.html b/concepts-flows-import.html index 5c0a34ea1b..f932a3801e 100644 --- a/concepts-flows-import.html +++ b/concepts-flows-import.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-flows.html b/concepts-flows.html index 73020cd0dd..1aaf05f70d 100644 --- a/concepts-flows.html +++ b/concepts-flows.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-overview.html b/concepts-overview.html index d5ecfebf03..488bbccc24 100644 --- a/concepts-overview.html +++ b/concepts-overview.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-playground.html b/concepts-playground.html index c70234b3b2..c9f4901b14 100644 --- a/concepts-playground.html +++ b/concepts-playground.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-publish.html b/concepts-publish.html index 93fa7bd3ec..ae197b03f0 100644 --- a/concepts-publish.html +++ b/concepts-publish.html @@ -24,7 +24,7 @@ - + diff --git a/concepts-voice-mode.html b/concepts-voice-mode.html index b96016b5e9..3da7059add 100644 --- a/concepts-voice-mode.html +++ b/concepts-voice-mode.html @@ -24,7 +24,7 @@ - + diff --git a/configuration-cli.html b/configuration-cli.html index f4398a34dc..e98ff85c52 100644 --- a/configuration-cli.html +++ b/configuration-cli.html @@ -24,7 +24,7 @@ - + diff --git a/configuration-custom-database.html b/configuration-custom-database.html index db840484f1..60dd94fea5 100644 --- a/configuration-custom-database.html +++ b/configuration-custom-database.html @@ -24,7 +24,7 @@ - + @@ -81,7 +81,9 @@ Langflow can more efficiently handle multiple users and larger workloads by usin

  • In your .env file, set LANGFLOW_DATABASE_URL to your PostgreSQL connection string:


    _10
    LANGFLOW_DATABASE_URL="postgresql://user:password@localhost:5432/dbname"

    -

    Langflow uses SQLAlchemy with the psycopg driver to pass SSL parameters directly to the PostgreSQL connection. The following SSL modes are supported:

    +

    Langflow uses SQLAlchemy with the psycopg driver to pass SSL parameters directly to the PostgreSQL connection.

    +
    PostgreSQL driver compatibility

    Langflow requires psycopg2-binary or psycopg[binary] as the PostgreSQL driver. The asyncpg driver is not compatible with Langflow's current database schema due to stricter timezone handling requirements.

    +

    The following SSL modes are supported:

    • sslmode=require: Requires SSL connection but doesn't verify server certificate. This option is the least secure, but acceptable for most use cases.

      diff --git a/configuration-global-variables.html b/configuration-global-variables.html index 3ddcc5602f..61ebc2ef8b 100644 --- a/configuration-global-variables.html +++ b/configuration-global-variables.html @@ -24,7 +24,7 @@ - + diff --git a/contributing-bundles.html b/contributing-bundles.html index 7283a0f611..0579e14961 100644 --- a/contributing-bundles.html +++ b/contributing-bundles.html @@ -24,7 +24,7 @@ - + diff --git a/contributing-community.html b/contributing-community.html index b16962a04d..8cd8709ac9 100644 --- a/contributing-community.html +++ b/contributing-community.html @@ -24,7 +24,7 @@ - + diff --git a/contributing-component-tests.html b/contributing-component-tests.html index ad439b5654..2f33132ecd 100644 --- a/contributing-component-tests.html +++ b/contributing-component-tests.html @@ -24,7 +24,7 @@ - + diff --git a/contributing-components.html b/contributing-components.html index cfcf56fbb9..394bc57524 100644 --- a/contributing-components.html +++ 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a/integrations-opik.html b/integrations-opik.html index 237fc80530..427ec35a67 100644 --- a/integrations-opik.html +++ b/integrations-opik.html @@ -24,7 +24,7 @@ - + diff --git a/legacy-core-components.html b/legacy-core-components.html index 4c0ed7c802..4375228f56 100644 --- a/legacy-core-components.html +++ b/legacy-core-components.html @@ -24,7 +24,7 @@ - + diff --git a/llm-selector.html b/llm-selector.html index f205ed044e..3681ff0132 100644 --- a/llm-selector.html +++ b/llm-selector.html @@ -24,7 +24,7 @@ - + diff --git a/logging.html b/logging.html index 547549d416..2b9037c60e 100644 --- a/logging.html +++ b/logging.html @@ -24,7 +24,7 @@ - + diff --git a/loop.html b/loop.html index 48dcd47400..0fcdcc3663 100644 --- a/loop.html +++ b/loop.html @@ -24,7 +24,7 @@ - + diff --git a/luna-for-langflow.html b/luna-for-langflow.html index ea4c79e26d..f433b49dbb 100644 --- a/luna-for-langflow.html +++ b/luna-for-langflow.html @@ -24,7 +24,7 @@ - + diff --git a/mcp-client.html 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\ No newline at end of file diff --git a/smart-router.html b/smart-router.html index 06018d0fde..f6aef1588f 100644 --- a/smart-router.html +++ b/smart-router.html @@ -24,7 +24,7 @@ - + diff --git a/smart-transform.html b/smart-transform.html index 5b6ae2cf0a..fe14c79ebe 100644 --- a/smart-transform.html +++ b/smart-transform.html @@ -24,7 +24,7 @@ - + diff --git a/split-text.html b/split-text.html index a29da025a0..1654a97d62 100644 --- a/split-text.html +++ b/split-text.html @@ -24,7 +24,7 @@ - + diff --git a/sql-database.html b/sql-database.html index fb6fa4c0f3..0ce8fcffd0 100644 --- a/sql-database.html +++ b/sql-database.html @@ -24,7 +24,7 @@ - + diff --git a/structured-output.html b/structured-output.html index 28917d4f38..0545072e48 100644 --- a/structured-output.html +++ b/structured-output.html @@ -24,7 +24,7 @@ - + diff --git a/text-input-and-output.html b/text-input-and-output.html index 68c5944097..d6af3142c1 100644 --- a/text-input-and-output.html +++ b/text-input-and-output.html @@ -24,7 +24,7 @@ - + diff --git a/troubleshoot.html b/troubleshoot.html index 7029b17625..e4b4d5e751 100644 --- a/troubleshoot.html +++ b/troubleshoot.html @@ -24,7 +24,7 @@ - + @@ -133,6 +133,11 @@ For example:

      Package is not installed​

      In Langflow OSS, you can follow the error message's instructions to install the missing dependency.

      To manage dependencies in Langflow Desktop, see Install custom dependencies in Langflow Desktop.

      +

      PostgreSQL asyncpg driver compatibility issue​

      +

      The following error can occur when initializing Langflow with a PostgreSQL database:

      +

      _10
      sqlalchemy.exc.DBAPIError: (sqlalchemy.dialects.postgresql.asyncpg.Error) <class 'asyncpg.exceptions.DataError'>: invalid input for query argument $7: datetime.datetime(2025, 10, 31, 14, 8, 5... (can't subtract offset-naive and offset-aware datetimes)

      +

      This error occurs because asyncpg has stricter timezone handling than psycopg2, and is not fully compatible with Langflow's current database schema.

      +

      To resolve this issue, remove asyncpg from your installation and use psycopg2 instead.

      An API key must be passed as query or header​

      The following error can occur when attempting to sign up on the Langflow sign in page: An API key must be passed as query or header.

      This means that LANGFLOW_AUTO_LOGIN is set to false, and only superusers can create and activate non-superuser accounts. @@ -210,7 +215,7 @@ For more information, see Tokenization

      1. Ensure your components follow the required directory structure.

        -

        _10
        /your/custom/components/path/ # Base directory set by LANGFLOW_COMPONENTS_PATH
        _10
        └── category_name/ # Required category subfolder that determines menu name
        _10
        ├── __init__.py # Required
        _10
        └── custom_component.py # Component file

        +

        _10
        /your/custom/components/path/ # Base directory set by LANGFLOW_COMPONENTS_PATH
        _10
        └── category_name/ # Required category subfolder that determines menu name
        _10
        ├── __init__.py # Required
        _10
        └── custom_component.py # Component file

      2. Verify each category directory includes an __init__.py file. @@ -227,7 +232,7 @@ If you're using the LANGFLOW_COMPONENTS_PATH environment varia