Citizen Joe Armor Skin Crash

[Nakoju]

Version info
Java version:
Minecraft Forge version: 1.16.5

Crash when enabling the Citizen Joe Armor Skin

Steps to reproduce the behavior:
Equip armor and click on the blue dot in the Visuals tab of the workbench.

Including versions, provided by crash report if game crashed:
Only Numina 2.2.32 and Modular Powersuits 2.2.32 on Forge 1.16.5-36.2.39

Smallest sub-list that still produces issue, if any exclusion testing was done:

My latest.log:
https://pastebin.com/DgBc0u0V

Sadly this was v e r y hard to spot since this happened in a modpack, though I've noticed on my server it crashes anyone who is around. Strangely only on the server only I've been able to load in and only until I do anything it won't crash.