Update app.py

app.py

@@ -121,7 +121,7 @@ def load_prompt():
 def load_chain():
     '''Load langchain Conversational Retrieval Chain'''
     
-    cfa_db = load_vectorstore(embeddings)
+    vectorstore = load_vectorstore(embeddings)
     llm = ChatOpenAI(temperature=0)
     streaming_llm = ChatOpenAI(streaming=True, 
                                callback_manager=CallbackManager([StreamingStdOutCallbackHandler()]),