Uncaught exception in thread "main" java.lang.RuntimeException: An exception occurred when launching the server! at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:71) Caused by: java.lang.RuntimeException: Mixin transformation of net.minecraft.server.Main failed at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427) at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323) at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218) at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:528) at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:473) at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202) at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422) ... 8 more Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [fabric-data-generation-api-v1.mixins.json:server.MainMixin from mod fabric-data-generation-api-v1] from phase [DEFAULT] in config [fabric-data-generation-api-v1.mixins.json] FAILED during APPLY at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinError(MixinProcessor.java:638) at org.spongepowered.asm.mixin.transformer.MixinProcessor.handleMixinApplyError(MixinProcessor.java:589) at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:379) ... 11 more Caused by: org.spongepowered.asm.mixin.transformer.throwables.InvalidMixinException: Unexpecteded ClassMetadataNotFoundException whilst transforming the mixin class: [MAIN Applicator Phase -> fabric-data-generation-api-v1.mixins.json:server.MainMixin from mod fabric-data-generation-api-v1 -> Apply Methods -> ([Ljava/lang/String;Lorg/spongepowered/asm/mixin/injection/callback/CallbackInfo;)V:handler$zbk000$fabric-data-generation-api-v1$main -> Transform LVT -> var=args -> desc=[Ljava/lang/String;] at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformMethod(MixinTargetContext.java:520) at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyNormalMethod(MixinApplicatorStandard.java:463) at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMethods(MixinApplicatorStandard.java:449) at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:308) at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:246) at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:437) at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:418) at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363) ... 11 more Caused by: org.spongepowered.asm.mixin.throwables.ClassMetadataNotFoundException: java.lang.String at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformSingleDescriptor(MixinTargetContext.java:1016) at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformSingleDescriptor(MixinTargetContext.java:976) at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformLVT(MixinTargetContext.java:573) at org.spongepowered.asm.mixin.transformer.MixinTargetContext.transformMethod(MixinTargetContext.java:479) ... 18 more