Update functions.py

functions.py

@@ -567,8 +567,11 @@ def QA_chain(llm):
         input_variables=["question", "documents"],
     )
 
-    # Create and return the question-answering chain
-    return rag_chain = prompt | llm | StrOutputParser()
+    
+    rag_chain = LLMChain(prompt=prompt, llm=llm, output_parser=StrOutputParser())
+
+    
+    return rag_chain