An error occurred during credentials validation: HTTPConnectionPool(host='127.0.0.1', port=11434): Max retries exceeded with url: /api/chat (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fe0c69616d0>: Failed to establish a new connection: [Errno 111] Connection refused'))
如上是我的 配置以及具体报错，求大神解答