Not sure if this is an issue or not #703

One of my modpacks is not letting people join servers, and the only error I get is this error from this mod. I have checked both server and client and can't see what's causing this except this error on the client.

[25Oct2026 12:38:04.373] [Worker-ResourceReload-6/ERROR][ModernFix/]: Caught exception in thread Thread[#229,Worker-ResourceReload-6,5,main]
org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392) ~[mixin-booster-0.1.3+1.20.1.jar%23906%23910!/:0.12.8+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250) ~[mixin-booster-0.1.3+1.20.1.jar%23906%23910!/:0.12.8+mixin.0.8.5]
at org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131) ~[mixin-0.8.5.jar:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4]
at org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131) ~[mixin-0.8.5.jar:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4]
at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:156) ~[modlauncher-10.0.9.jar:10.0.9+10.0.9+main.dcd20f30]
at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-10.0.9.jar:?]
at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-10.0.9.jar:?]
at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-10.0.9.jar:?]
at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:113) ~[securejarhandler-2.1.10.jar:?]
at cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?]
at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229) ~[securejarhandler-2.1.10.jar:?]
at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?]
at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135) ~[securejarhandler-2.1.10.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:490) ~[?:?]
at java.lang.Class.forName0(Native Method) ~[?:?]
at java.lang.Class.forName(Class.java:547) ~[?:?]
at org.spongepowered.asm.service.modlauncher.ModLauncherClassProvider.findClass(ModLauncherClassProvider.java:76) ~[mixin-booster-0.1.3+1.20.1.jar%23906%23910!/:0.12.8+mixin.0.8.5]
at settingdust.lazyyyyy.forge.core.faster_mixin.injected.FasterClassProviderWrapper.findClass(FasterClassProviderWrapper.java:26) ~[lazyyyyy-lexforge-core-0.14.19.jar%23904%23909!/:?]
at org.spongepowered.asm.mixin.transformer.MixinProcessor.audit(MixinProcessor.java:254) ~[mixin-booster-0.1.3+1.20.1.jar%23906%23910!/:0.12.8+mixin.0.8.5]
at org.spongepowered.asm.mixin.transformer.MixinTransformer.audit(MixinTransformer.java:171) ~[mixin-booster-0.1.3+1.20.1.jar%23906%23910!/:0.12.8+mixin.0.8.5]
at org.spongepowered.asm.mixin.MixinEnvironment.audit(MixinEnvironment.java:1425) ~[mixin-booster-0.1.3+1.20.1.jar%23906%23910!/:0.12.8+mixin.0.8.5]
at org.embeddedt.modernfix.util.ClassInfoManager.doClear(ClassInfoManager.java:70) ~[?:?]
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.compute(ForkJoinTask.java:1753) ~[?:?]
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.compute(ForkJoinTask.java:1745) ~[?:?]
at java.util.concurrent.ForkJoinTask$InterruptibleTask.exec(ForkJoinTask.java:1662) ~[?:?]
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:511) ~[?:?]
at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1450) ~[?:?]
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:2019) ~[?:?]
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187) ~[?:?]
Caused by: org.spongepowered.asm.mixin.injection.throwables.InjectionError: Critical injection failure: Redirector valhelsia_core_run$registerBlockStateModels(Lnet/minecraft/data/models/BlockModelGenerators;)V in valhelsia_core-common.mixins.json:ModelProviderMixin from mod (unknown) failed injection check, (0/1) succeeded. Scanned 1 target(s). Using refmap valhelsia_core-common-refmap.json