500 服务器报错了

api = TqApi()
File “/Users/steven/opt/anaconda3/lib/python3.7/site-packages/tqsdk/api.py”, line 220, in __init__
self._setup_connection() # 初始化通讯连接
File “/Users/steven/opt/anaconda3/lib/python3.7/site-packages/tqsdk/api.py”, line 1189, in _setup_connection
quotes = self._fetch_symbol_info(self._ins_url)
File “/Users/steven/opt/anaconda3/lib/python3.7/site-packages/tqsdk/api.py”, line 1253, in _fetch_symbol_info
rsp.raise_for_status()
File “/Users/steven/opt/anaconda3/lib/python3.7/site-packages/requests/models.py”, line 941, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 500 Server Error: Internal Server Error for url: https://openmd.shinnytech.com/t/md/symbols/latest.json