been getting that crash in 1282 (which is currently one of the most stable versions for pixelmon due to legendary spawn events conflicting with sponge at its latest builds, which crashes the server) My crash happens with the 0.4.1 version of Nucleus: The Ultimate Essentials Plugin (MC 1.10.2, 1.11.2, 1.12.2) - #109 by dualspiral
and also the same crash happens with the latest build of forgesponge and @dualspiral
0.4.0 version
I’d recommend downgrading your version or disabling legendary pokes from spawning in the wilderness. Idk why it causes the server to crash; but once a legendary poke spawns it’ll crash. (You can test this by changing your legends to spawn every second and see the crashes pile up)