Bedrock dedicated server crashed

Hello,

Yesterday my server crashed.
Server specs:
Ubuntu 18.04.3 LTS (GNU/Linux 4.15.0-96-generic x86_64)
Running on commercial VPS bought here https://www.nazwa.pl/vps/
Cheapest option VPS Start -> Intel Xeon E5 2,2 GHz
Bedrock server running in screen on a root account.
I can't figure out what was the reason, so I think this should be reported as a bug.
Here is the crash log:
https://paste.ubuntu.com/p/WF23GjqVX3

 

Best regards!
Paul