[MM3-users] HyperKitty needs regis, really?

Hi

I am seeing a whole bunch of error messages in mailmansuite.log whenever a new message is sent to be archived:

ERROR 2017-05-14 15:41:41,261 13634 django.request Internal Server Error: /hyperkitty/api/mailman/archive ... File "/opt/mailman/venv-2.7/local/lib/python2.7/site-packages/redis/connection.py", line 442, in connect raise ConnectionError(self._error_message(e)) ConnectionError: Error 111 connecting to localhost:6379. Connection refused.

I didn't see this mentioned anywhere. Does HyperKitty need a running regis server to work? What am I missing?

Simon