Ok, so I rebooted and when people joined it INSTANTLY crashed. Keep in mind this is self hosted. So I was going through logs and saw a bunch of stuff, I kept looking and I saw nothing I could fix, I'm currently trying to fix it by removing some new plugins I got but whenever I restart and some joins server goes rip. This is the crash report. Update: Did a last resort risk, saved part of the server.
Hey, It appears that you are receiving a lot of errors to do with your world/chunks. Make a back-up of your worlds and delete them. Let new worlds generate and see if your issue keeps happening.
It's memory. Your chucks can't load because some other things are using it. StackOverflowError happens when a method calls itself too many times. Try to remove unnecessary plugins and/or disable stuff in configs
