fix

app.py

@@ -53,7 +53,6 @@ prompt = PromptTemplate(
     template=template,
 )
 
-chain = LLMChain(llm=llm, prompt=prompt)#, callbacks=[QueueCallback])
 
 pinecone.init(
     api_key=PINECONE_API_KEY, 
@@ -121,6 +120,8 @@ def stream(input_text, history, user_prompt, topic, topk) -> Generator:
 
     # Create a funciton to call - this will run in a thread
     def task():
+        chain = LLMChain(llm=llm, prompt=prompt, callbacks=[QueueCallback(q)])
+        
         tool_resp = query_tool(topic, topk, input_text)
 
         response = chain({"instuction": user_prompt, "user": input_text, "content": tool_resp})