Update app.py

app.py

@@ -37,11 +37,11 @@ async def cancel_local_func(state_chatbot: Sequence, cancel_btn: gr.Button,
         reset_btn (gr.Button): the reset button
         session_id (int): the session id
     """
-    yield (state_chatbot, disable_btn, disable_btn)
+    yield (state_chatbot, disable_btn, disable_btn, session_id)
     InterFace.async_engine.stop_session(session_id)
     # pytorch backend does not support resume chat history now
     if InterFace.async_engine.backend == 'pytorch':
-        yield (state_chatbot, disable_btn, enable_btn)
+        yield (state_chatbot, disable_btn, enable_btn, session_id)
     else:
         with InterFace.lock:
             InterFace.global_session_id += 1