Update app.py

app.py

@@ -181,7 +181,8 @@ with gr.Blocks() as demo:
     gr.Markdown("# 🎓 REFRAG Multi-Agent Tutor")
     
     with gr.Tab("AI Chatbot"):
-        chatbot = gr.Chatbot(type="messages", height=400)
+        #chatbot = gr.Chatbot(type="messages", height=400)
+        chatbot = gr.Chatbot(value=[], height=400)
         with gr.Row():
             msg = gr.Textbox(placeholder="Ask your tutor...", scale=4)
             submit = gr.Button("Send", variant="primary")