Mod Name

Connector and Ars Nouveau (or related)

Mod Homepage

https://www.curseforge.com/minecraft/mc-mods/ars-nouveau

Minecraft version

1.21.1

Describe the bug

I was trying to find the Wilden Wing that allows me to fly. I got it and looked for other loot in the area when the crash happened. I don't know why it happened. I have tried to link the crash report below. Sorry if I did it wrong.

Steps to reproduce

1. Load into the game.
2. Sometimes make it a few seconds before crashing. Sometimes, crash happens immediately.
3. Unsure what caused it. I was in the Ars Library trying to find the Wilden Wing so I could fly and a crash was triggered potentially after I picked up a codex entry (I am not sure) or because I stepped on a pressure plate. However, getting away from the library doesn't change anything so it is probably an item that is messed up. Crash report said it could be an issue with Connector mod.
4. Crash says "java.lang.NullPointerException: Cannot read field "spellSchools" because "event.spellPart" is null
   at TRANSFORMER/sauce@"

...

Logs

https://gist.github.com/RTNightmare/e61933972492c4bd76efcdf64c16f238

Additional context

Custom made modpack with a bunch of mods. Modpack code: kKOasW7m