Help. Error Rendering entity in world. Geckolib model, Fabric.

Hello, I created armor using Geckolib because the fabric generator does not support creating armor, or rather 3D models of armor.but when I did everything - the build started. But when I put the armor on and tried to look at it through F5 or the inventory it threw this error. Help please.

https://pastebin.com/6rjBmA9Y