Item texture not loaded and got lot of error

[graceful shell]

I'm trying to make 3D items, just copying all the animation controller, animation, etc from trident. The geo created from Blockbench. I've tried modifying the file, and got a lot of error as I expected. This is first time I'm creating custom item (a 3D item).

Okay, so I've tried to messing around, no error now (I guess since playing on BDS)