diff --git a/apps/common/mobile/lib/controller/ContextMenu.jsx b/apps/common/mobile/lib/controller/ContextMenu.jsx
index 73af1007ad..5bfbf92055 100644
--- a/apps/common/mobile/lib/controller/ContextMenu.jsx
+++ b/apps/common/mobile/lib/controller/ContextMenu.jsx
@@ -206,10 +206,12 @@ class ContextMenuController extends Component {
         Common.Notifications.off('document:ready', this.onDocumentReady);
 
         const api = Common.EditorApi.get();
-        api.asc_unregisterCallback('asc_onShowPopMenu', this.onApiOpenContextMenu);
-        api.asc_unregisterCallback('asc_onHidePopMenu', this.onApiHideContextMenu);
-        api.asc_unregisterCallback('asc_onShowForeignCursorLabel', this.onApiShowForeignCursorLabel);
-        api.asc_unregisterCallback('asc_onHideForeignCursorLabel', this.onApiHideForeignCursorLabel);
+        if ( api ) {
+            api.asc_unregisterCallback('asc_onShowPopMenu', this.onApiOpenContextMenu);
+            api.asc_unregisterCallback('asc_onHidePopMenu', this.onApiHideContextMenu);
+            api.asc_unregisterCallback('asc_onShowForeignCursorLabel', this.onApiShowForeignCursorLabel);
+            api.asc_unregisterCallback('asc_onHideForeignCursorLabel', this.onApiHideForeignCursorLabel);
+        }
     }
 
     componentDidMount() {
diff --git a/apps/common/mobile/lib/controller/Plugins.jsx b/apps/common/mobile/lib/controller/Plugins.jsx
index 8c7d5394f3..c4ceb3ded2 100644
--- a/apps/common/mobile/lib/controller/Plugins.jsx
+++ b/apps/common/mobile/lib/controller/Plugins.jsx
@@ -31,10 +31,12 @@ const PluginsController = inject('storeAppOptions')(observer(props => {
         return () => {
             const api = Common.EditorApi.get();
 
-            api.asc_unregisterCallback("asc_onPluginShow", showPluginModal);
-            api.asc_unregisterCallback("asc_onPluginClose", pluginClose);
-            api.asc_unregisterCallback("asc_onPluginResize", pluginResize);
-            api.asc_unregisterCallback('asc_onPluginsInit', onPluginsInit);
+            if ( api ) {
+                api.asc_unregisterCallback("asc_onPluginShow", showPluginModal);
+                api.asc_unregisterCallback("asc_onPluginClose", pluginClose);
+                api.asc_unregisterCallback("asc_onPluginResize", pluginResize);
+                api.asc_unregisterCallback('asc_onPluginsInit', onPluginsInit);
+            }
         };
     });