[15:29:08] [Worker-ResourceReload-0/ERROR]: Could not force-load net.minecraft.class_1937
org.spongepowered.asm.mixin.throwables.ClassAlreadyLoadedException: net.minecraft.world.World was already classloaded
        at org.spongepowered.asm.mixin.transformer.MixinProcessor.audit(MixinProcessor.java:262) ~[sponge-mixin-0.15.4+mixin.0.8.7.jar:0.15.4+mixin.0.8.7]
        at org.spongepowered.asm.mixin.transformer.MixinTransformer.audit(MixinTransformer.java:171) ~[sponge-mixin-0.15.4+mixin.0.8.7.jar:0.15.4+mixin.0.8.7]
        at org.spongepowered.asm.mixin.MixinEnvironment.audit(MixinEnvironment.java:1677) ~[sponge-mixin-0.15.4+mixin.0.8.7.jar:0.15.4+mixin.0.8.7] 
        at knot/org.embeddedt.modernfix.util.ClassInfoManager.doClear(ClassInfoManager.java:70) ~[modernfix-fabric-5.20.3+mc1.21.4.jar:?]
        at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.compute(ForkJoinTask.java:1726) [?:?]
        at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.compute(ForkJoinTask.java:1717) [?:?]
        at java.base/java.util.concurrent.ForkJoinTask$InterruptibleTask.exec(ForkJoinTask.java:1641) [?:?]
        at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:507) [?:?]
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1460) [?:?]
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:189) [?:?]