Animated Java Entities Crash Game

Hello, I am pretty new to Mcreator, and am trying to create an Eragon Mod. I have been working on model animations. I had managed to get Animated Java Models from Blockbench with the Geckolib plugin. As soon as I figured out how to get the animations to work in-game, everything broke. I managed to get everything working, then after I deleted the test entities and such and tried to make a new entity, the Animated Java Model no longer worked at all -- with or without an animation. Whenever I try and load a world with an Animated Java Model, it says "Joining World", then immediately "Saving World...". I so can't join any world with these animated models. The weird part is that it was working perfectly fine, but then all of a sudden the Java Animated Models crash the world.

Any help or insight would be greatly appreciated!