Fix api_server: fix run_extractor_prompt return

api_server.py

@@ -186,7 +186,7 @@ def run_extractor_prompt(req_data):
             logger.error("llm does not return update_user_profile")
             return {}
     else:
-        raise {}
+        return {}
 
 def run_chat_prompt(req_data):
     prompt = req_data['prompt']