Fix: tokenizer issue. (#11902)

#11786
### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

rag/nlp/search.py

@@ -13,6 +13,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
+import asyncio
 import json
 import logging
 import re
@@ -607,7 +608,7 @@ class Dealer:
         if not toc:
             return chunks
 
-        ids = relevant_chunks_with_toc(query, toc, chat_mdl, topn*2)
+        ids = asyncio.run(relevant_chunks_with_toc(query, toc, chat_mdl, topn*2))
         if not ids:
             return chunks