[00:05:47] [Server thread/FATAL] [ne.mi.fm.lo.RuntimeDistCleaner/DISTXFORM]: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER
> [00:05:51] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.ReportedException: Ticking entity
	at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:872) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:328) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:808) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:668) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:258) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.lang.RuntimeException: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER
	at net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:71) ~[fmlloader-1.18.1-39.0.88.jar:1.0]
	at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-9.1.0.jar:?]
	at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-9.1.0.jar:?]
	at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-9.1.0.jar:?]
	at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:110) ~[securejarhandler-1.0.1.jar:?]
	at cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:213) ~[securejarhandler-1.0.1.jar:?]
	at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:223) ~[securejarhandler-1.0.1.jar:?]
	at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:213) ~[securejarhandler-1.0.1.jar:?]
	at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:130) ~[securejarhandler-1.0.1.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?]
	at com.nindybun.burnergun.common.items.upgrades.Auto_Smelt.AutoSmeltProvider.<init>(AutoSmeltProvider.java:17) ~[%2381!/:?]
	at com.nindybun.burnergun.common.items.upgrades.Auto_Smelt.AutoSmelt.initCapabilities(AutoSmelt.java:59) ~[%2381!/:?]
	at net.minecraft.world.item.ItemStack.lambda$forgeInit$10(ItemStack.java:1002) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraftforge.common.capabilities.CapabilityProvider.getCapabilities(CapabilityProvider.java:101) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2376%2382!/:?]
	at net.minecraftforge.common.capabilities.CapabilityProvider.areCapsCompatible(CapabilityProvider.java:113) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2376%2382!/:?]
	at net.minecraft.world.item.ItemStack.matches(ItemStack.java:434) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.world.item.ItemStack.matches(ItemStack.java:422) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.world.inventory.AbstractContainerMenu.triggerSlotListeners(AbstractContainerMenu.java:206) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.world.inventory.AbstractContainerMenu.broadcastChanges(AbstractContainerMenu.java:163) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.level.ServerPlayer.tick(ServerPlayer.java:407) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.level.ServerLevel.tickNonPassenger(ServerLevel.java:649) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.world.level.Level.guardEntityTick(Level.java:487) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.level.ServerLevel.lambda$tick$3(ServerLevel.java:316) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.world.level.entity.EntityTickList.forEach(EntityTickList.java:54) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:296) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:868) ~[forge-1.18.1-39.0.88_mapped_official_1.18.1-recomp.jar%2377!/:?]
	... 5 more

So I have an itemStack with a gui that I grabbed from the creative menu on the dev server but I get this Ticking Entity and invalid dist DEDICATED_SERVER error which points to the itemStack's provider here. The provider is made the same way as all the other one I have that works.

I think it might be because I'm calling Minecraft.getInstance() in the ItemHandler.

1 hour ago, diesieben07 said:

• This code runs on server and client. You are reaching across logical sides here. If you need the level here, pass it to the class' constructor.

if I'm going to pass the level into the Handler class' constructor, where am I getting the level from? Because the Handler is called by the Provider, which is called by initCapabilities in the main class.

https://github.com/NindyBun/BurnerGun_1.18.1/blob/d1d98e332ad9aaedb33123ccc074271678459183/src/main/java/com/nindybun/burnergun/common/items/upgrades/Auto_Smelt/AutoSmeltHandler.java#L58

dont set the stack in isItemValid