pymongo.errors.ServerSelectionTimeoutError: No servers found yet

Выставил за nginx + uwsgi и на некторых урлах nginx начал давать 502 ошибку, ругается так
File "/srv/YourSecReport/env/lib/python3.5/site-packages/pymongo/mongo_client.py", line 1377, in 
Feb 27 19:49:39 YourSecReport uwsgi[16878]:     return self._topology.get_server_session()
Feb 27 19:49:39 YourSecReport uwsgi[16878]:   File "/srv/YourSecReport/env/lib/python3.5/site-packages/pymongo/topology.py", line 416, in get_s
Feb 27 19:49:39 YourSecReport uwsgi[16878]:     None)
Feb 27 19:49:39 YourSecReport uwsgi[16878]:   File "/srv/YourSecReport/env/lib/python3.5/site-packages/pymongo/topology.py", line 199, in _sele
Feb 27 19:49:39 YourSecReport uwsgi[16878]:     self._error_message(selector))
Feb 27 19:49:39 YourSecReport uwsgi[16878]: pymongo.errors.ServerSelectionTimeoutError: No servers found yet