Been playing on a server with my friend for awhile now, and he had just logged off for the day, and I was exploring the end, and the server just randomly crashed, and now every time I try and load in, it crashes the server with the same error, but he can load in fine without the server crashing, did I load a corrupted chunk maybe? every time I connect the console reads:
Server thread/WARN Can't keep up! Is the server overloaded? Running 2902ms or 58 ticks behind
Crash Report:
https://gist.github.com/ItsNebb/ba8b2aa8459f93954cfc85e70f5b4479

we got the same issue

maybe give your friend permission to use commands and then right when the server loads up have the tp command ready so your friend can tp you to him?

you can use /cu unstuck <player>, even while they're offline, to move a player to worldspawn

you can use /cu unstuck <player>, even while they're offline, to move a player to worldspawn

thats great info actually i never knew that

Updating to 1.0.21b for the server and my client and fixed this issue for me! Patch notes:
"1.0.21 and 1.0.21b are both compatible, this update is a patch for servers
Forge 43.2.14
Small update to fix ars break spells, and End generation crashes"