Crash when I get some items

[DrSigma4164]

Hi! When I move some items into the inventory, each time they are different, it crashme. I looked at the log and saw a couple of lines related to your mod. Is this a problem in your modor something else? If not with yours then could you say what is causing the error by looking at the log?

Versions:
Minecraft: 1.16.5
Forge: 36.2.8
Mod Version: 2.1.03

Log:
crash-2021-12-08_20.29.44-server.txt