Update multi_agent.py

multi_agent.py

@@ -52,9 +52,9 @@ def run_multi_agent(llm, message):
 
     chat_history = ""
 
-    chat_json = json.loads(chat_history_str)
+    chat_result_json = json.loads(chat_result)
         
-    for message in chat_json["messages"]:
+    for message in chat_result_json["messages"]:
         chat_history += f"Role: {message['role']}, Content: {message['content']}\n"
     
     image_data = read_image_file("/home/user/app/coding/ytd_stock_gains.png")