I created a mod where it adds a new dimension, some new items, and a mob. Every time I try to spawn the mob, my game crashes instantly. It just freezes the screen, and I can't exit out unless I use task manager or alt + F4. I tried checking out another issue called Custom Mob Crashes Minecraft instantly when spawned, but that didn't have a solution. I am using MCreator version 2019.5, Minecraft version 1.12.2.