Update app.py

app.py

@@ -258,7 +258,7 @@ def ask(user_message, chat_history):
 
     response = chatbot(user_message, chat_history)
     chat_history.append((user_message, response))
-    return chat_history
+    return chat_history , chat_history, ""
 
 # Initialize chat history with a welcome messageinitial_message = (None, "Hello, how can I help you with Moodle?")
 initial_message = (None, "Hello, how can I help you with Moodle?")