Update app.py

app.py

@@ -255,7 +255,7 @@ class ChatDocumentQA:
                 return "", chat_history
         except:
             chat_history.append((message, "Please Upload Document or URL"))
-            return "", chat_history
+            return input_text, chatbot_response
 
     def gradio_interface(self) -> None:
         """Create a Gradio interface for the chatbot."""