Something weird happening to the textures of my blockbench model when I imported it into Mcreator.

I made a model using blockbench for a mod and imported it into mcreator and the ingame model ended up like.. this....

It's supposed to look like this:

 

I don't know what to do honestly, I've tried changing the UV textures.. Making it into one texture.. Resized Textures + The Model itself, But it always gets broken like this or another weird thing like this happens. The file itself is imported into mcreator as a  .JSON

This is my first time creating a forum topic and trying to explain a bug i dont know of so, sorry if it is very vague/doesnt give alot to work on.