RAG_PLAYGROUND - Error loading Knowledge Base Files

Hi,

Using Basic Examples, langchain or llamaindex, upload_button fail to upload .txt or .pdf files in "kb.py" file line 39
with gr.Row():
upload_button = gr.UploadButton("Add File", file_types=["pdf","txt"], file_count="multiple")

gradio.exceptions.Error: "Invalid file type. Please upload a file that is one of these formats: ['pdf', 'txt']"
Thanks for your help!

log below:

milvus-standalone | [2025/06/15 15:08:03.033 +00:00] [WARN] [dist/dist_handler.go:112] ["node last heart beat time lag too behind"] [now=2025/06/15 15:08:03.033 +00:00] [lastHeartBeatTime=2025/06/15 15:07:42.235 +00:00] [nodeID=14]
rag-playground | [1] Jun 15 15:07:46 [ INFO] - uvicorn.access - 172.20.0.1:45696 - "POST /content/kb/gradio_api/upload HTTP/1.1" 200
rag-playground | [1] Jun 15 15:07:46 [ INFO] - uvicorn.access - 172.20.0.1:45696 - "POST /content/kb/gradio_api/queue/join?__theme=light HTTP/1.1" 200
rag-playground | Traceback (most recent call last):
rag-playground | File "/usr/local/lib/python3.10/dist-packages/gradio/queueing.py", line 625, in process_events
rag-playground | response = await route_utils.call_process_api(
rag-playground | File "/usr/local/lib/python3.10/dist-packages/gradio/route_utils.py", line 322, in call_process_api
rag-playground | output = await app.get_blocks().process_api(
rag-playground | File "/usr/local/lib/python3.10/dist-packages/gradio/blocks.py", line 2216, in process_api
rag-playground | inputs = await self.preprocess_data(
rag-playground | File "/usr/local/lib/python3.10/dist-packages/gradio/blocks.py", line 1882, in preprocess_data
rag-playground | processed_input.append(block.preprocess(inputs_cached))
rag-playground | File "/usr/local/lib/python3.10/dist-packages/gradio/components/upload_button.py", line 190, in preprocess
rag-playground | return [self._process_single_file(f) for f in payload] # type: ignore
rag-playground | File "/usr/local/lib/python3.10/dist-packages/gradio/components/upload_button.py", line 190, in
rag-playground | return [self._process_single_file(f) for f in payload] # type: ignore
rag-playground | File "/usr/local/lib/python3.10/dist-packages/gradio/components/upload_button.py", line 157, in _process_single_file
rag-playground | raise Error(
rag-playground | gradio.exceptions.Error: "Invalid file type. Please upload a file that is one of these formats: ['pdf', 'txt']"
rag-playground | [1] Jun 15 15:07:46 [ INFO] - uvicorn.access - 172.20.0.1:45696 - "GET /content/kb/gradio_api/queue/data?session_hash=6jcjgqfkk19 HTTP/1.1" 200

Commencez dans kb.py vers la ligne 39 et reproduisez l’upload en suivant le flux Basic Examples avec des fichiers .txt et .pdf. Vérifiez la validation de Gradio UploadButton affichée dans le traceback ; c’est terminé lorsque les deux types de fichiers pris en charge sont téléversés avec succès sans l’erreur Invalid file type.