Since my beginning with MM400, I encounter issues when receiving notifications on my iOS and other mobile devices. It seems to work after a reboot of the server, however a few hours later, no messages are sent out. In addition, I cannot relogin on my mobile devices. I receive I blank screen and after a few seconds: Loading Error - You may be offline or the MM server you are trying to connect to is experiencing problems.
Steps to reproduce
Using currently MM402 on Ubuntu (Microsoft Azure), I receive this in my log files over and over again:
[2017/08/13 18:24:32 UTC] [EROR] /api/v3/users/websocket:connect code=500 rid=9j43wc1hepbr9nhomcgbmwomor uid=wxeqb7pd5jfmupyibiz7afz6ie ip=xxx.xxx.xxx.xxx Failed to upgrade websocket connection [details: ] [2017/08/13 18:24:32 UTC] [EROR] websocket connect err: websocket: origin not allowed
What could be the issue here?