The Server crashes with the following stacktrace:
https://gist.github.com/Seniorendi/0e35f4dc39f251f083f603eb61435bf3
There is no crash report, the server freezes, and it does not generate one.

I used the restriction command from chickenchunks. If the player I had forbidden with it, the server crashes.

This has been resolved. Duplicate of: #76