[1.12.2] Not compatible with Mixin 0.8.3+

[LlamaLad7]

MixinLoader breaks with Mixin 0.8.3+, as MixinProcessor became package-private, leading to

java.lang.IllegalAccessError: tried to access class org.spongepowered.asm.mixin.transformer.MixinProcessor from class net.minecraftforge.fml.common.Loader
    at net.minecraftforge.fml.common.Loader.handler$zza000$beforeConstructingMods(Loader.java:1141)

MixinBooter fixed this here, perhaps you could implement something similar.

[Mysticpasta1]

look into this with JEID (Just Enough IDs) I possibly can fix it later for VanillaFix

[xJon]

Is there any update on this?