Today i tried to open my game after updating a couple of mods of my modpack and when i went to the singleplayer menu and clicked in the create a new world button, it crashed suddently. Here's the crash report.

I'm posting here because in the mixin stacktrace (thanks to MixinTrace) the top mixin listed is of this mod.

My bad, the issue was on my side. I use Data Loader, a mod that forces datapacks from .minecraft\datapacks to load in any worlds, and one of my datapacks was missing a comma in a json and it was crashing the whole thing apart.

Sorry for that.