Mixin failures

Mixin apply failed — one mod could not patch the game

What the log looks like

mixin apply(?:ing)? failed
org\.spongepowered\.asm\.mixin\.transformer\.throwables\.mixinapplyerror
mixintransformererror

How to fix it

  1. The line names the mixin config, and its prefix is the mod id that broke
  2. Update that mod, or remove it to confirm it is the one
  3. Mixin failures very often mean the mod is for another Minecraft version
SeverityStops the game
CategoryMixin failures

Check your own log

Related errors

Mixin failuresCritical injection failure — a mixin could not find its targetTwo mods are usually fighting over the same game methodMixin failuresInvalidMixinException: Mod Mixin Failed to ApplyOpen your latest.log or crash report and look for 'Mixin apply for mod' or the 'Config :' line inside the 'InvMixin failuresInvalidMixinException: Unexpecteded ClassMetadataNotFoundExceptionFind the line saying 'Mixin apply for mod <modname> failed' or 'from mod <modname>' right above the error in yMixin failuresMixin Transformation of net.minecraft.client.main.Main FailedOpen latest.log or the launcher crash output and look at the Caused by lines below Mixin transformation of netMixin failuresMixinExtras is missing or too oldUpdate the mod that needs it — modern mods bundle MixinExtras themselvesMixin failuresMixinTargetAlreadyLoadedException: Required Class Loaded PrematurelyRename your SpongeForge JAR file in the mods folder so it begins with an underscore or 'aaa' (for example, '_s