Update app.py

app.py

@@ -105,7 +105,7 @@ qa_chain = ConversationalRetrievalChain.from_llm(
 )
 
 def qa_response(user_message, chat_history, context):
-    response = llm_chain.predict(user_message, chat_history, context=context)
+    response = qa_chain_chain.predict(user_message, chat_history, context=context)
     return response
 
 chatbot_gradio_app = gr.ChatInterface(fn=qa_response)