t

app.py

@@ -46,13 +46,13 @@ async def start_chat():
     cl.user_session.set("chain", chain)
 
 @cl.on_message
-async def main(message):
+async def main(message: cl.Message):
     chain = cl.user_session.get("chain")
     cb = cl.AsyncLangchainCallbackHandler(
         stream_final_answer=True, answer_prefix_tokens=["FINAL", "ANSWER"]
     )
     cb.answer_reached = True
-    res = await chain.acall(message, callbacks=[cb])
+    res = await chain.acall(message.content, callbacks=[cb])
 
     answer = res["result"]