When I try to launch the game using this mod in my mod pack the game crashes and I get the following error:
The game crashed: bootstrap
Error: java.lang.RuntimeException: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered"

Thanks for reporting. Please send game logs.

latest.log

debug.log

I can't find anything related to the Attributes mod in these logs that could cause the issue. There is also no error that you have mentioned.

Thats weird because my launch of te game only crashes when that mod is installed even when only these three mods are in the mods folder.

1. puffish_attributes-0.7.4-1.21.5-neoforge
2. Stronger Skill Tree for pufferfish's skills
3. puffish_skills-0.16.0-1.21.5-neoforge