Not sure why but whenever I join a server I play on, my game crashes. The only way I can join without crashing is if someone teleports me away from the area I am at, then my game loads fine. After looking at the crash notes, it mentions failing to render a specific entity (com.pixelmonmod.pixelmon.entities.npcs.NPCTrainer), so I assumed that removing said entity should fix it, however if it's the type I believe it to be, they are the random trainer NPCs that spawn around players, making it hard to avoid. I've had it crash for the NPCs that randomly spawn and boss NPC's like N.

Related Crash Logs here:
https://pastebin.com/gsEk9uQx
https://pastebin.com/iv8Vpxr2
https://pastebin.com/RGNXZZ9R

So this issue fixed itself temporarily for a few days but has come back and now it's affecting more players than just myself. Mod list wasn't changed, nothing was updated, just started up again.

Hello,
I have the exact same error on my server, and it's a trainer on a battle arena for me
Thank you to look it and good luck !