This issue occurs when only Valkyrien Skies and addons are installed and no other mods

• I have tested this issue and it occurs when no other mods are installed

Minecraft Version

1.20.x

Mod Loader

Forge

Issue description

Server won't start and I'm only receiving this issue:
[05:05:14] [main/WARN] [mixin/]: Error loading class: blusunrize/immersiveengineering/common/gui/BlockEntityInventory (java.lang.ClassNotFoundException: blusunrize.immersiveengineering.common.gui.BlockEntityInventory)
[05:05:14] [main/WARN] [mixin/]: Error loading class: cofh/core/block/entity/TileCoFH (java.lang.ClassNotFoundException: cofh.core.block.entity.TileCoFH)
[05:05:14] [main/ERROR] [mixin/]: valkyrienskies-common.mixins.json:feature.container_distance_check.MixinContainer: Interface mixin contains a non-public method! Found includeShipsInDistanceCheck(Lnet/minecraft/world/entity/player/Player;DDD)D in valkyrienskies-common.mixins.json:feature.container_distance_check.MixinContainer
org.spongepowered.asm.mixin.transformer.throwables.InvalidInterfaceMixinException: Interface mixin contains a non-public method! Found includeShipsInDistanceCheck(Lnet/minecraft/world/entity/player/Player;DDD)D in valkyrienskies-common.mixins.json:feature.container_distance_check.MixinContainer
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorInterface.prepareMethod(MixinPreProcessorInterface.java:65) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.prepare(MixinPreProcessorStandard.java:187) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinInfo$State.validate(MixinInfo.java:322) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinInfo.validate(MixinInfo.java:913) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinConfig.postInitialise(MixinConfig.java:801) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:567) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:462) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:438) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:290) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131) ~[mixin-0.8.5.jar%2365!/:0.8.5+Jenkins-b310.git-155314e6e91465dad727e621a569906a410cd6f4] {}
at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:156) ~[modlauncher-10.0.9.jar%2355!/:10.0.9+10.0.9+main.dcd20f30] {}
at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:113) ~[securejarhandler-2.1.10.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229) ~[securejarhandler-2.1.10.jar:?] {}
at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219) ~[securejarhandler-2.1.10.jar:?] {}
at java.lang.ClassLoader.loadClass(ClassLoader.java:637) ~[?:?] {}
at java.lang.Class.forName(Class.java:545) ~[?:?] {}
at net.minecraftforge.fml.loading.ImmediateWindowHandler$DummyProvider.lambda$updateModuleReads$1(ImmediateWindowHandler.java:145) ~[fmlloader-1.20.1-47.2.19.jar%2369!/:1.0] {}
at java.util.Optional.map(Optional.java:260) ~[?:?] {}
at net.minecraftforge.fml.loading.ImmediateWindowHandler$DummyProvider.updateModuleReads(ImmediateWindowHandler.java:145) ~[fmlloader-1.20.1-47.2.19.jar%2369!/:1.0] {}
at net.minecraftforge.fml.loading.ImmediateWindowHandler.acceptGameLayer(ImmediateWindowHandler.java:71) ~[fmlloader-1.20.1-47.2.19.jar%2369!/:1.0] {}
at net.minecraftforge.fml.loading.FMLLoader.beforeStart(FMLLoader.java:207) ~[fmlloader-1.20.1-47.2.19.jar%2369!/:1.0] {}
at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.launchService(CommonLaunchHandler.java:92) ~[fmlloader-1.20.1-47.2.19.jar%2369!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:108) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar%2355!/:?] {}
at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] {}
[05:05:14] [main/WARN] [mixin/]: Error loading class: kotlin/Unit (java.lang.ClassNotFoundException: kotlin.Unit)
Exception in thread "main" java.lang.RuntimeException: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:32)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:108)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:78)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141)
Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:250)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.service.modlauncher.MixinTransformationHandler.processClass(MixinTransformationHandler.java:131)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinLaunchPluginLegacy.processClass(MixinLaunchPluginLegacy.java:131)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:156)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:113)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.lambda$findClass$15(ModuleClassLoader.java:219)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:229)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:219)
at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:135)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3402)
at java.base/java.lang.Class.getMethodsRecursive(Class.java:3543)
at java.base/java.lang.Class.getMethod0(Class.java:3529)
at java.base/java.lang.Class.getMethod(Class.java:2225)
at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111)
at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonLaunchHandler.serverService(CommonLaunchHandler.java:103)
at MC-BOOTSTRAP/[email protected]/net.minecraftforge.fml.loading.targets.CommonServerLaunchHandler.lambda$makeService$0(CommonServerLaunchHandler.java:27)
at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30)
... 7 more
Caused by: org.spongepowered.asm.mixin.throwables.ClassMetadataNotFoundException: kotlin.Unit
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transformField(MixinPreProcessorStandard.java:771)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.transform(MixinPreProcessorStandard.java:741)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.attach(MixinPreProcessorStandard.java:310)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinPreProcessorStandard.createContextFor(MixinPreProcessorStandard.java:280)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinInfo.createContextFor(MixinInfo.java:1288)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:292)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:383)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:365)
at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
... 29 more

Issue reproduction

Launching the forge server via command line.
Planning to test other versions of Forge-47.2.X

Logs

latest.log
debug.log

As KP2048 said, install Kotlin for Forge

I'm pretty sure the kotlin stdlib is missing from the classpath. Try installing kotlin for forge. Specifically I'm looking at the java.lang.ClassNotFoundException: kotlin.Unit bit. the Unit type in kotlin is equivalent to the void type in java and is actually an object (so kinda like a singleton) provided by the kotlin standard library, and seeing as it can't find such a basic type in the classpath, you must not have kotlin for forge installed

I'm pretty sure the kotlin stdlib is missing from the classpath. Try installing kotlin for forge. Specifically I'm looking at the java.lang.ClassNotFoundException: kotlin.Unit bit. the Unit type in kotlin is equivalent to the void type in java and is actually an object (so kinda like a singleton) provided by the kotlin standard library, and seeing as it can't find such a basic type in the classpath, you must not have kotlin for forge installed

through my testing im pretty sure that kotlin is causing the issue

worked for me

Please do not post on old closed issues.

I had this happen trying to add VS on a server - Remember to install Kotlin on the server too :)

Your comment is unrelated to the post issue, read the comment above yours.

This was the only result for the error posted so here's where I put my finding :)

Ruby already said the same thing and closed the issue, there is no point in commenting on it again.

Just wanted to confirm that the solution Ruby mentioned still holds strong in case anyone, you know, reads closed threads. But hey, rules are rules, right? Wouldn't want to rock the boat too much by gasp adding a potentially helpful comment.