The client keeps crashing when I spawn in the Entity

I used Geckolib Blockbench to model and animate the entity, and I used Nerdy's Geckolib plugin for the MCreator software. And the Forge version is 1.20.1 47.3.0

I haven't used this software that much so I hadn't encountered this problem before. I did successfully spawn in a simple entity before. But this time when I used a much more complicated model and animation, the client tended to crash every time I spawned in the entity. (It doesn't crash when I launch it, even after creating the world)

I don't know if it's because of the model, or the animations, or if the software has some requirements that I don't know about the animated entities.