保存数据的时候报错，请问是什么原因

supported_type.save()
refresh app router failed: 'api_server'
Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python2.7/site-packages/leancloud/object_.py", line 222, in save
response = client.post('/classes/{0}?fetchWhenSave={1}'.format(self.classname, fetch_when_save), data)
File "/usr/lib/python2.7/site-packages/leancloud/client.py", line 90, in new_func
return func(headers=headers, *args, **kwargs)
File "/usr/lib/python2.7/site-packages/leancloud/client.py", line 171, in new_func
response = func(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/leancloud/client.py", line 155, in new_func
response = func(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/leancloud/client.py", line 223, in post
response = requests.post(get_base_url() + url, headers=headers, data=json.dumps(params, separators=(',', ':')), timeout=TIMEOUT_SECONDS)
File "/usr/lib/python2.7/site-packages/requests/api.py", line 110, in post
return request('post', url, data=data, json=json, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/api.py", line 56, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 475, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 596, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/adapters.py", line 487, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='none', port=443): Max retries exceeded with url: /1.1/classes/SupportedType?fetchWhenSave=false (Caused by NewConnectionError(': Failed to establish a new connection: [Errno -2] Name or service not known',))