I tried in creative mode, doing so will not cause a crash
This is the crash report
crash-2024-12-02_22.00.02-client.txt
and latest log
latest.log

Have same error thet u have.
But in new world work perfectly. If delete Suplementary mod crash is disapeard in both worlds.
Waiting for fix plsplsplspls

Seems like our integration with Suplementaries is broken, due to API changes on their behalf.
I will have to disable this integration.

@yKvin @shardclay

This is working for me: https://github.com/Dralaon/SpellEngine---Removed-Quiver-Compat-1.20.1/releases/tag/0.15.12%2B1.20.1
Delete the 0.15.11 version before.

Thank you to @Dralaon, the PR was useful as I currently do not have a Java 17 build environment.

Released just now, feel free to reopen the issue if crashes with the new version occur.