Minecraft Version

1.21.1

What happened?

Client crash on startup.

https://www.curseforge.com/minecraft/mc-mods/cataclysm-spellbooks

Relevant Log Outputs

https://gist.github.com/gvancamp/310aebe5c6b6bd8532f34e458bf62a9c

Same here.
Here is my log
deb.log

Minimal set of mods:
this file:
mods.zip
plus this:
https://www.curseforge.com/minecraft/mc-mods/lendercataclysm/files/6906997
plus this:
https://www.curseforge.com/minecraft/mc-mods/irons-spells-n-spellbooks/files/7036419

Also downgrading to version azurelib-neo-1.21.1-3.0.33.jar fixes this error

Looks like it is fixed with azurelib-neo-1.21.1-3.0.37.jar