Update app.py

app.py

@@ -170,7 +170,7 @@ def handle_userinput(user_question ):
 
     
     # Invoke conversation chain
-    response = st.session_state.conversation.invoke({"question": user_question})
+    response = st.session_state.conversation({"question": user_question})
     st.session_state.chat_history.append({"role": "assistant", "content": response})
 
     for i, message in enumerate(st.session_state.chat_history):