https://pastebin.com/eUPejamT

Ok, btw this mod currently probably won't work with the mod you linked me for now

1.0.3 for the mod, 0.13.1 for the loader, 1.18.1 for the game

Uh. That's rather strange since it says that there is an error with a non-existing ExampleMixin in the mixin file. Does it happen with an older version? Could you also send me zip of the mods you are using?

I'm currently debugging another issue, but... my mod count might hit some kind of limit, though I'll see what I can do.

Of note is that I do have a mod installed that has it's own fox variants

https://www.curseforge.com/minecraft/mc-mods/shadews-foxes

I'll test it after I've found the cause of a bug I'm currently running into that is unrelated to your mod

Do me a favor and try using this version instead, i may have found the cause https://github.com/Emafire003/FoxGlow/releases/tag/v1.0.4

Could you please fill me in with some more details like what version of the mod are you using and your minecraft version and such?

I think it should be fixed now, let me know and i'll close the issue