I'm getting a crash related to the anvil mixin when I try to generate resources
latest.log
debug.log

Sorry,
Version 8.6.2 for 1.20.1

Do you have mixingradle applied? It's required to load deps with obfuscated mixins so the refmaps are not applied (otherwise the obfuscated targets, which do not exist in dev, will be searched for). From the crash log you've provided, it seems like you don't have mixingradle loaded, as the mixin is searching for an obfuscated target.

That was definitely it, thank you!