After updating from 3.0 -> 3.1 i can't load game anymore.
MC crashes early on load with this error:

Initializing game

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(ModMixinLoader.java:1139)

Downgrading to 3.0 fixes this issue.
debug.log

Unf... I could try.

Thanks, much appreciated.

Seems like an incompatibility with Integrated Proxy. Can you try without it?

I disabled Integrated Proxy, but have same error.
debug.log

Some other mod is doing the same hack as Integrated Proxy 💤 hmm, I'll try write a check for this.

Im testing it on my modpack E2E-E. Since it hosted on CF, you can install it to test on, if it would help.

I'll do that, thanks

Should be fixed in cade0f9, curse build uploading...

New 3.2 version wouldn't help.
debug.log

Rename the mixinbooter you downloaded by removing the . in front of it. I can't fix this other than doing that, this is other mods doing stupid stuff.

I would stay on 3.0 i guess. I can rename it on my instance, but as far as i know, i cant distribute modpack on CF with renamed files.

I hate mods doing stupid shit, I'll upload a thin jar.

@Krutoy242 can you distribute if I upload the file as an additional file?: https://www.curseforge.com/minecraft/mc-mods/mixin-booter/files/3614763

Oof, i don't know how to do that.
I'm using CurseForge launcher to select mods and it automatically download jar associated with this mod. I dont know how to select another file, other than main one.

It's fine, if that jar works for you I'll upload it as a separate version.

I would test it during next month. Already publishing pack with 3.0 version.

Seems like problem fixed by itself.
Using .mixinbooter-4.1 and load game fine.