Describe the bug
I spawned an Army Skeleton using a spawn egg in Creative Mode, then gave myself a Wand to create a squad. Once I created & assigned the squad, I backed out of the GUI. Once I right clicked back into it with the wand, and clicked "Select Squad", The game immediately crashed client side. After some extensive testing I've determined that it will crash no matter how you obtain the army skeleton / wand.
So long as you create a squad, then attempt to "select squad", client side will collapse into pieces.

This doesn't appear to be an issue in Single Player, only when hosted on a server.

To Reproduce
Steps to reproduce the crash:

1. Host Overlord-3.1.4+1.18.2 on a Dedicated Server
2. Summon Army Skeleton (Spawn Egg, Grave-Spawn, etc)
3. Create a Squad & Assign the Squad to the Army Skeleton
4. Exit the GUI & Re-enter it; Then Click "Select Squad"
5. Observe the Client Crash

Logs/Screenshots/Videos
Video
Crash Log

Versions:

• Minecraft: 1.18.2
• Mod Version: 3.1.4
• Fireplace Lib Version: 6.3.1
• Fabric API: 0.48.0

Notable Info

• Doesn't Crash Server
• Fabric API is out of date; Latest release = 0.50.0 on April 10th, 2022
• Crash Log is Consistent

Thank you for the fix!

Should be fixed in 3.1.5, try it out and reopen if you still have issues.