Just got back from server room..
Yesterday in 14:00 UTC server got shutdown due to hardware failure.. Restart didn't help. I had to get into server housing to investigate the issue. It turned out that power supply had failed together with one of the fans.
The problem was to get replacement because it was Friday evening..
Anyway PSU is replaced and I hope it will last ..
Next time I'll try not to forget to inform everyone on our Discord channel and Instagram profile.