It makes a time I can't open my 1.12.2 mods.

I tried to remove mods, change the chickenlib version, but nothing change.

I even got another error with Mixin, when it's not Codechickenlib.

I joined the devlog.
debug-1.log

You have a corrupt mod in your mods folder.

Mods are regular zip files, try to open them with 7zip, you'll find the broken one.