update app.py

app.py

@@ -51,7 +51,7 @@ async def main(message: cl.Message):
     else:
         # Handle the question as usual
         response = await asyncio.to_thread(retrieval_augmented_qa_chain.invoke, {"question": message.content})
-        await cl.Message(content=response['content']).send()
+        await cl.Message(content=response).send()
 
     res = await ask_action()
     await handle_response(res)