Observed behaviour

I got a crash during starting up the game with Tetra and Iron's Spellbooks

Expected behaviour

I expected Iron's Spellbook to have support to Tetra, and my game would load normally.

Steps to reproduce

1. Download latest version of Forge (47.3.12) MC Version 1.20.1 in CurseForge
2. Download Tetra and Iron's Spellbook
3. Start up the game
4. Crash!

Server Type

Single Player

Crashlog

https://gist.github.com/rndmninja/57d40a7cbfebf6965ea2923ca4f6c20f

Iron's Spells N Spellbooks version

1.20.1-3.4.0.4

Forge version

Forge 47.3.12

Other mods

I tried it without my massive mods and the issue still occurred. These are the only mods that I used and they are the dependencies.

• Caelus API (Forge-3.20+1.20.1)
• Curious API (Forge-5.11.0+1.20.1)
• playerAnimator (Forge-1.0.2-rc1+1.20)
• mutil (1.20.1-6.1.1)
• GeckoLib (Forge-1.20.1-4.4.9)

Crashlog Check

• I understand if this is a crashbug and I did not attach a crashlog, this will not be handled

The Tetra compat that ISS has seems to be outdated with Tetra's new update. Reach out to the Tetra developer and see what needs to be changed to resolve the issue.

according to mickelus it sounds like an issue on his end

fixed in 3.4.0.5