Update app.py

app.py

@@ -68,7 +68,7 @@ with gr.Blocks() as demo:
                 if mode != 'Conversation':
                     yield 'waiting video input...', state
                 response, _ = gradio_backend(query=message, state=state, mode=mode)
-                yield response, {}                
+                return response, {}                
                 
             def gr_chatinterface_chatbot_clear_fn():
                 return {}, {}, 0, 0