[1.16.5] Item that let the player change into annother Dimension crashes my Game

[Faro]

Each time I am using my item, the game crashes. Thats my code:

 @Override
    public ActionResult<ItemStack> use(World world, PlayerEntity player, Hand hand) {
        

            if (!world.isClientSide() && !player.isPassenger() && !player.isVehicle() && player.canChangeDimensions()) {
                RegistryKey<World> registrykey = world.dimension() == World.NETHER ? World.OVERWORLD : World.NETHER;
                ServerWorld serverworld = world.getServer().getLevel(registrykey);
                if (serverworld != null) {
                    player.handleInsidePortal(player.blockPosition());
                    player.changeDimension(serverworld,teleporter);
                    return ActionResult.success(player.getItemInHand(hand));
                }

            }

        

        return ActionResult.fail(player.getItemInHand(hand));

    }

 

Edited August 4, 2021 by Faro

[Faro]

Unreported exception thrown!
java.lang.ClassCastException: net.minecraft.client.world.ClientWorld cannot be cast to net.minecraft.world.server.ServerWorld

 

But I looked it up in the EndPortal class and its done the same way

 

[Faro]

[04Aug2021 18:40:29.126] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmluserdevclient, --fml.mcpVersion, 20210115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, --fml.forgeVersion, 36.1.0, --version, MOD_DEV, --assetIndex, 1.16, --assetsDir, C:\Users\Faro\.gradle\caches\forge_gradle\assets, --username, Dev, --accessToken, ????????, --userProperties, {}]
[04Aug2021 18:40:29.132] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.0.9+86+master.3cf110c starting: java version 1.8.0_291 by Oracle Corporation
[04Aug2021 18:40:29.682] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[04Aug2021 18:40:29.723] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/Users/Faro/.gradle/caches/modules-2/files-2.1/org.spongepowered/mixin/0.8.2/1cf212283d26f706fd3074318870bebd14d2a9ed/mixin-0.8.2.jar Service=ModLauncher Env=CLIENT
[04Aug2021 18:40:31.531] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmluserdevclient' with arguments [--version, MOD_DEV, --gameDir, ., --assetsDir, C:\Users\Faro\.gradle\caches\forge_gradle\assets, --assetIndex, 1.16, --username, Dev, --accessToken, ????????, --userProperties, {}]
[04Aug2021 18:40:37.017] [Render thread/INFO] [com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService/]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[04Aug2021 18:40:37.701] [Render thread/ERROR] [net.minecraft.client.Minecraft/]: Failed to verify authentication
com.mojang.authlib.exceptions.AuthenticationUnavailableException: null
    at com.mojang.authlib.yggdrasil.YggdrasilSocialInteractionsService.checkPrivileges(YggdrasilSocialInteractionsService.java:97) ~[authlib-2.1.28.jar:?]
    at com.mojang.authlib.yggdrasil.YggdrasilSocialInteractionsService.<init>(YggdrasilSocialInteractionsService.java:40) ~[authlib-2.1.28.jar:?]
    at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.createSocialInteractionsService(YggdrasilAuthenticationService.java:152) ~[authlib-2.1.28.jar:?]
    at net.minecraft.client.Minecraft.createSocialInteractions(Minecraft.java:551) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.Minecraft.<init>(Minecraft.java:383) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.main.Main.main(Main.java:149) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_291]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_291]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_291]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_291]
    at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?]
    at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
[04Aug2021 18:40:37.709] [Render thread/INFO] [net.minecraft.client.Minecraft/]: Setting user: Dev
[04Aug2021 18:40:37.804] [Render thread/INFO] [net.minecraft.client.Minecraft/]: Backend library: LWJGL version 3.2.2 build 10
[04Aug2021 18:40:38.446] [modloading-worker-2/INFO] [net.minecraftforge.common.ForgeMod/FORGEMOD]: Forge mod loading, version 36.1.0, for MC 1.16.5 with MCP 20210115.111550
[04Aug2021 18:40:38.447] [modloading-worker-2/INFO] [net.minecraftforge.common.MinecraftForge/FORGE]: MinecraftForge v36.1.0 Initialized
[04Aug2021 18:40:39.903] [Render thread/INFO] [com.mojang.text2speech.NarratorWindows/]: Narrator library for x64 successfully loaded
[04Aug2021 18:40:39.968] [Render thread/INFO] [net.minecraft.resources.SimpleReloadableResourceManager/]: Reloading ResourceManager: Default, Mod Resources
[04Aug2021 18:40:40.053] [Forge Version Check/INFO] [net.minecraftforge.fml.VersionChecker/]: [forge] Starting version check at https://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json
[04Aug2021 18:40:40.436] [Render thread/WARN] [net.minecraftforge.common.ForgeHooks/]: Called deprecated GlobalEntityTypeAttributes#put for farosvikingsmod:freyr, use EntityAttributeCreationEvent instead.
[04Aug2021 18:40:41.093] [Forge Version Check/INFO] [net.minecraftforge.fml.VersionChecker/]: [forge] Found status: OUTDATED Current: 36.1.0 Target: 36.2.0
[04Aug2021 18:40:42.605] [Worker-Main-11/INFO] [net.Faro.farosvikingsmod.FarosVikingsMod/]: Got game settings net.minecraft.client.GameSettings@4850a7a8
[04Aug2021 18:40:44.867] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to load model: 'minecraft:brew_kettle' referenced from: farosvikingsmod:brew_kettle#facing=north: java.io.FileNotFoundException: minecraft:models/brew_kettle.json
[04Aug2021 18:40:46.680] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to load model: 'farosvikingsmod:freyr_spawn_egg#inventory' referenced from: farosvikingsmod:freyr_spawn_egg#inventory: java.io.FileNotFoundException: farosvikingsmod:models/item/freyr_spawn_egg.json
[04Aug2021 18:40:46.693] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to load model: 'minecraft:models/item/shield' referenced from: farosvikingsmod:copper_shield#inventory: java.io.FileNotFoundException: minecraft:models/models/item/shield.json
[04Aug2021 18:40:46.694] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to load model: 'farosvikingsmod:copper_pickaxe#inventory' referenced from: farosvikingsmod:copper_pickaxe#inventory: java.io.FileNotFoundException: farosvikingsmod:models/item/copper_pickaxe.json
[04Aug2021 18:40:46.695] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to load model: 'farosvikingsmod:copper_shovel#inventory' referenced from: farosvikingsmod:copper_shovel#inventory: java.io.FileNotFoundException: farosvikingsmod:models/item/copper_shovel.json
[04Aug2021 18:40:46.699] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to load model: 'minecraft:trident' referenced from: farosvikingsmod:mjoelnir#inventory: java.io.FileNotFoundException: minecraft:models/trident.json
[04Aug2021 18:40:46.711] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to load model: 'minecraft:hofund' referenced from: farosvikingsmod:hofund#inventory: java.io.FileNotFoundException: minecraft:models/hofund.json
[04Aug2021 18:40:46.961] [Worker-Main-14/WARN] [net.minecraft.client.renderer.model.ModelBakery/]: Unable to resolve texture reference: #missing in farosvikingsmod:item/hofund
[04Aug2021 18:40:48.147] [Worker-Main-12/INFO] [net.Faro.farosvikingsmod.FarosVikingsMod/]: Hello world from the MDK
[04Aug2021 18:40:48.147] [Worker-Main-12/INFO] [net.Faro.farosvikingsmod.FarosVikingsMod/]: Got IMC [Hello world]
[04Aug2021 18:40:49.576] [Render thread/INFO] [net.minecraft.client.audio.SoundSystem/]: OpenAL initialized.
[04Aug2021 18:40:49.577] [Render thread/INFO] [net.minecraft.client.audio.SoundEngine/SOUNDS]: Sound engine started
[04Aug2021 18:40:49.891] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x256x0 jei:textures/atlas/gui.png-atlas
[04Aug2021 18:40:49.893] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 2048x2048x0 minecraft:textures/atlas/blocks.png-atlas
[04Aug2021 18:40:49.931] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x128x0 minecraft:textures/atlas/signs.png-atlas
[04Aug2021 18:40:49.931] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x512x0 minecraft:textures/atlas/banner_patterns.png-atlas
[04Aug2021 18:40:49.932] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x512x0 minecraft:textures/atlas/shield_patterns.png-atlas
[04Aug2021 18:40:49.950] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x256x0 minecraft:textures/atlas/chest.png-atlas
[04Aug2021 18:40:49.951] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x256x0 minecraft:textures/atlas/beds.png-atlas
[04Aug2021 18:40:49.951] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 512x256x0 minecraft:textures/atlas/shulker_boxes.png-atlas
[04Aug2021 18:40:50.625] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x256x0 minecraft:textures/atlas/particles.png-atlas
[04Aug2021 18:40:50.627] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x256x0 minecraft:textures/atlas/paintings.png-atlas
[04Aug2021 18:40:50.627] [Render thread/INFO] [net.minecraft.client.renderer.texture.AtlasTexture/]: Created: 256x128x0 minecraft:textures/atlas/mob_effects.png-atlas
[04Aug2021 18:40:51.193] [Realms Notification Availability checker #1/INFO] [com.mojang.realmsclient.client.RealmsClient/]: Could not authorize you against Realms server: Invalid session id
[04Aug2021 18:41:27.404] [Render thread/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[04Aug2021 18:41:27.405] [Render thread/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[04Aug2021 18:41:27.405] [Render thread/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[04Aug2021 18:41:27.406] [Render thread/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[04Aug2021 18:41:27.407] [Render thread/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[04Aug2021 18:41:27.410] [Render thread/INFO] [net.minecraft.resources.SimpleReloadableResourceManager/]: Reloading ResourceManager: Default, forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar, main, jei-1.16.3-7.+_mapped_official_1.16.5.jar
[04Aug2021 18:41:28.267] [Render thread/INFO] [net.minecraft.item.crafting.RecipeManager/]: Loaded 7 recipes
[04Aug2021 18:41:29.001] [Render thread/INFO] [net.minecraft.advancements.AdvancementList/]: Loaded 942 advancements
[04Aug2021 18:41:29.548] [Render thread/INFO] [com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService/]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[04Aug2021 18:41:29.573] [Server thread/INFO] [net.minecraft.server.integrated.IntegratedServer/]: Starting integrated minecraft server version 1.16.5
[04Aug2021 18:41:29.573] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Generating keypair
[04Aug2021 18:41:29.658] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Configuration file .\saves\New World (63)\serverconfig\forge-server.toml is not correct. Correcting
[04Aug2021 18:41:29.659] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server was corrected from null to its default, SimpleCommentedConfig:{}. 
[04Aug2021 18:41:29.659] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.removeErroringEntities was corrected from null to its default, false. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.removeErroringTileEntities was corrected from null to its default, false. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.fullBoundingBoxLadders was corrected from null to its default, false. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.zombieBaseSummonChance was corrected from null to its default, 0.1. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.zombieBabyChance was corrected from null to its default, 0.05. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.logCascadingWorldGeneration was corrected from null to its default, true. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.fixVanillaCascading was corrected from null to its default, false. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.dimensionUnloadQueueDelay was corrected from null to its default, 0. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.treatEmptyTagsAsAir was corrected from null to its default, false. 
[04Aug2021 18:41:29.660] [Server thread/WARN] [net.minecraftforge.common.ForgeConfigSpec/CORE]: Incorrect key server.fixAdvancementLoading was corrected from null to its default, true. 
[04Aug2021 18:41:33.505] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Preparing start region for dimension minecraft:overworld
[04Aug2021 18:41:33.569] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 0%
[04Aug2021 18:41:34.017] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 0%
[04Aug2021 18:41:34.531] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 2%
[04Aug2021 18:41:35.023] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 6%
[04Aug2021 18:41:35.526] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 9%
[04Aug2021 18:41:36.021] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 12%
[04Aug2021 18:41:36.518] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 16%
[04Aug2021 18:41:37.023] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 19%
[04Aug2021 18:41:37.522] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 20%
[04Aug2021 18:41:38.021] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 26%
[04Aug2021 18:41:38.521] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 29%
[04Aug2021 18:41:39.016] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 33%
[04Aug2021 18:41:39.516] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 36%
[04Aug2021 18:41:40.015] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 40%
[04Aug2021 18:41:40.521] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 43%
[04Aug2021 18:41:41.016] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 48%
[04Aug2021 18:41:41.514] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 51%
[04Aug2021 18:41:42.031] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 56%
[04Aug2021 18:41:42.527] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 59%
[04Aug2021 18:41:43.022] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 64%
[04Aug2021 18:41:43.538] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 68%
[04Aug2021 18:41:44.013] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 72%
[04Aug2021 18:41:44.565] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 76%
[04Aug2021 18:41:45.021] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 81%
[04Aug2021 18:41:45.516] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 85%
[04Aug2021 18:41:46.029] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 88%
[04Aug2021 18:41:46.542] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 93%
[04Aug2021 18:41:47.018] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Preparing spawn area: 97%
[04Aug2021 18:41:47.221] [Server thread/INFO] [net.Faro.farosvikingsmod.FarosVikingsMod/]: HELLO from server starting
[04Aug2021 18:41:47.228] [Render thread/INFO] [net.minecraft.world.chunk.listener.LoggingChunkStatusListener/]: Time elapsed: 13716 ms
[04Aug2021 18:41:47.406] [Server thread/INFO] [net.minecraft.server.integrated.IntegratedServer/]: Changing view distance to 24, from 10
[04Aug2021 18:41:48.877] [Netty Local Client IO #0/INFO] [net.minecraftforge.fml.network.NetworkHooks/]: Connected to a modded server.
[04Aug2021 18:41:48.892] [Server thread/INFO] [net.minecraftforge.common.AdvancementLoadFix/]: Using new advancement loading for net.minecraft.advancements.PlayerAdvancements@b717c7e
[04Aug2021 18:41:48.904] [Server thread/INFO] [net.minecraft.server.management.PlayerList/]: Dev[local:E:208e25df] logged in with entity id 120 at (210.5, 64.0, -107.5)
[04Aug2021 18:41:48.930] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Dev joined the game
[04Aug2021 18:41:49.236] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Starting JEI...
[04Aug2021 18:41:49.431] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building ingredient list...
[04Aug2021 18:41:49.436] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building ingredient list took 4.750 ms
[04Aug2021 18:41:49.436] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building ingredient filter...
[04Aug2021 18:41:49.585] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building ingredient filter took 149.2 ms
[04Aug2021 18:41:49.585] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building bookmarks...
[04Aug2021 18:41:49.586] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building bookmarks took 984.6 ?s
[04Aug2021 18:41:49.586] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building recipe registry...
[04Aug2021 18:41:49.624] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building recipe registry took 38.00 ms
[04Aug2021 18:41:49.631] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building runtime...
[04Aug2021 18:41:49.668] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Building runtime took 36.96 ms
[04Aug2021 18:41:49.679] [Render thread/INFO] [mezz.jei.util.LoggedTimer/]: Starting JEI took 443.8 ms
[04Aug2021 18:41:49.778] [Render thread/INFO] [net.minecraft.advancements.AdvancementList/]: Loaded 0 advancements
[04Aug2021 18:41:50.017] [Server thread/INFO] [net.minecraft.server.integrated.IntegratedServer/]: Saving and pausing game...
[04Aug2021 18:41:50.032] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving chunks for level 'ServerLevel[New World]'/minecraft:overworld
[04Aug2021 18:41:52.619] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving chunks for level 'ServerLevel[New World]'/minecraft:the_nether
[04Aug2021 18:41:52.621] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving chunks for level 'ServerLevel[New World]'/minecraft:the_end
[04Aug2021 18:41:52.651] [Server thread/WARN] [net.minecraft.server.MinecraftServer/]: Can't keep up! Is the server overloaded? Running 3579ms or 71 ticks behind
[04Aug2021 18:42:06.968] [Render thread/FATAL] [net.minecraftforge.common.ForgeMod/]: Preparing crash report with UUID 69a2ce1c-d3b9-482d-97ca-30743f1b50f0
[04Aug2021 18:42:06.971] [Render thread/FATAL] [net.minecraft.client.Minecraft/]: Unreported exception thrown!
java.lang.ClassCastException: net.minecraft.client.world.ClientWorld cannot be cast to net.minecraft.world.server.ServerWorld
    at net.Faro.farosvikingsmod.setup.Tools.HofundSword.use(HofundSword.java:26) ~[main/:?]
    at net.minecraft.item.ItemStack.use(ItemStack.java:217) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.multiplayer.PlayerController.useItem(PlayerController.java:328) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.Minecraft.startUseItem(Minecraft.java:1389) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.Minecraft.handleKeybinds(Minecraft.java:1645) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.Minecraft.tick(Minecraft.java:1460) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:953) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.Minecraft.run(Minecraft.java:607) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_291]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_291]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_291]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_291]
    at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?]
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?]
    at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?]
[04Aug2021 18:42:08.137] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Dev has made the advancement [We Need to Go Deeper]
[04Aug2021 18:42:08.232] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Stopping server
[04Aug2021 18:42:08.233] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving players
[04Aug2021 18:42:08.239] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Dev lost connection: Disconnected
[04Aug2021 18:42:08.239] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Dev left the game
[04Aug2021 18:42:08.246] [Server thread/INFO] [net.minecraft.network.play.ServerPlayNetHandler/]: Stopping singleplayer server as player logged out
[04Aug2021 18:42:08.246] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving worlds
[04Aug2021 18:42:08.246] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving chunks for level 'ServerLevel[New World]'/minecraft:overworld
[04Aug2021 18:42:10.046] [Server thread/INFO] [net.minecraft.world.server.ChunkManager/]: ThreadedAnvilChunkStorage (New World (63)): All chunks are saved
[04Aug2021 18:42:10.046] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving chunks for level 'ServerLevel[New World]'/minecraft:the_nether
[04Aug2021 18:42:10.066] [Server thread/INFO] [net.minecraft.world.server.ChunkManager/]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[04Aug2021 18:42:10.066] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving chunks for level 'ServerLevel[New World]'/minecraft:the_end
[04Aug2021 18:42:10.068] [Server thread/INFO] [net.minecraft.world.server.ChunkManager/]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[04Aug2021 18:42:10.084] [Server thread/INFO] [net.minecraft.world.server.ChunkManager/]: ThreadedAnvilChunkStorage (New World (63)): All chunks are saved
[04Aug2021 18:42:10.102] [Server thread/INFO] [net.minecraft.world.server.ChunkManager/]: ThreadedAnvilChunkStorage (DIM-1): All chunks are saved
[04Aug2021 18:42:10.104] [Server thread/INFO] [net.minecraft.world.server.ChunkManager/]: ThreadedAnvilChunkStorage (DIM1): All chunks are saved
[04Aug2021 18:42:11.913] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:realStdoutPrintln:123]: ---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 04.08.21 18:42
Description: Unexpected error

java.lang.ClassCastException: net.minecraft.client.world.ClientWorld cannot be cast to net.minecraft.world.server.ServerWorld
    at net.Faro.farosvikingsmod.setup.Tools.HofundSword.use(HofundSword.java:26) ~[main/:?] {re:classloading}
    at net.minecraft.item.ItemStack.use(ItemStack.java:217) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,xf:fml:forge:filled_map.4,xf:fml:forge:itemstack}
    at net.minecraft.client.multiplayer.PlayerController.useItem(PlayerController.java:328) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.startUseItem(Minecraft.java:1389) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.handleKeybinds(Minecraft.java:1645) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.tick(Minecraft.java:1460) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.runTick(Minecraft.java:953) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.run(Minecraft.java:607) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_291] {}
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_291] {}
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_291] {}
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_291] {}
    at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}
    at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Render thread
Stacktrace:
    at net.Faro.farosvikingsmod.setup.Tools.HofundSword.use(HofundSword.java:26) ~[?:?] {re:classloading}
    at net.minecraft.item.ItemStack.use(ItemStack.java:217) ~[forge:?] {re:classloading,xf:fml:forge:filled_map.4,xf:fml:forge:itemstack}
    at net.minecraft.client.multiplayer.PlayerController.useItem(PlayerController.java:328) ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.startUseItem(Minecraft.java:1389) ~[forge:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.handleKeybinds(Minecraft.java:1645) ~[forge:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
-- Affected level --
Details:
    All players: 1 total; [ClientPlayerEntity['Dev'/120, l='ClientLevel', x=214.05, y=65.00, z=-106.75]]
    Chunk stats: Client Chunk Cache: 3025, 779
    Level dimension: minecraft:overworld
    Level spawn location: World: (208,64,-111), Chunk: (at 0,4,1 in 13,-7; contains blocks 208,0,-112 to 223,255,-97), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
    Level time: 322 game time, 322 day time
    Server brand: forge
    Server type: Integrated singleplayer server
Stacktrace:
    at net.minecraft.client.world.ClientWorld.fillReportDetails(ClientWorld.java:447) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.fillReport(Minecraft.java:2029) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.run(Minecraft.java:628) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(Main.java:184) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_291] {}
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_291] {}
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_291] {}
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_291] {}
    at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.9.jar:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.9.jar:?] {}
    at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.jar:?] {}

-- System Details --
Details:
    Minecraft Version: 1.16.5
    Minecraft Version ID: 1.16.5
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_291, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 721832248 bytes (688 MB) / 2007498752 bytes (1914 MB) up to 3806855168 bytes (3630 MB)
    CPUs: 12
    JVM Flags: 1 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump
    ModLauncher: 8.0.9+86+master.3cf110c
    ModLauncher launch target: fmluserdevclient
    ModLauncher naming: mcp
    ModLauncher services: 
        /mixin-0.8.2.jar mixin PLUGINSERVICE 
        /eventbus-4.0.0.jar eventbus PLUGINSERVICE 
        /forge-1.16.5-36.1.0_mapped_official_1.16.5-launcher.jar object_holder_definalize PLUGINSERVICE 
        /forge-1.16.5-36.1.0_mapped_official_1.16.5-launcher.jar runtime_enum_extender PLUGINSERVICE 
        /accesstransformers-3.0.1.jar accesstransformer PLUGINSERVICE 
        /forge-1.16.5-36.1.0_mapped_official_1.16.5-launcher.jar capability_inject_definalize PLUGINSERVICE 
        /forge-1.16.5-36.1.0_mapped_official_1.16.5-launcher.jar runtimedistcleaner PLUGINSERVICE 
        /mixin-0.8.2.jar mixin TRANSFORMATIONSERVICE 
        /forge-1.16.5-36.1.0_mapped_official_1.16.5-launcher.jar fml TRANSFORMATIONSERVICE 
    FML: 36.1
    Forge: net.minecraftforge:36.1.0
    FML Language Providers: 
        javafml@36.1
        minecraft@1
    Mod List: 
        client-extra.jar                                  |Minecraft                     |minecraft                     |1.16.5              |DONE      |a1:d4:5e:04:4f:d3:d6:e0:7b:37:97:cf:77:b0:de:ad:4a:47:ce:8c:96:49:5f:0a:cf:8c:ae:b2:6d:4b:8a:3f
        forge-1.16.5-36.1.0_mapped_official_1.16.5-recomp.|Forge                         |forge                         |36.1.0              |DONE      |NOSIGNATURE
        main                                              |Faros Vikings Mod             |farosvikingsmod               |NONE                |DONE      |NOSIGNATURE
        jei-1.16.3-7.+_mapped_official_1.16.5.jar         |Just Enough Items             |jei                           |7.6.0.50            |DONE      |NOSIGNATURE
    Crash Report UUID: 69a2ce1c-d3b9-482d-97ca-30743f1b50f0
    Launched Version: MOD_DEV
    Backend library: LWJGL version 3.2.2 build 10
    Backend API: GeForce GTX 980/PCIe/SSE2 GL version 4.6.0 NVIDIA 461.92, NVIDIA Corporation
    GL Caps: Using framebuffer using OpenGL 3.0
    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'forge'
    Type: Client (map_client.txt)
    Graphics mode: fast
    Resource Packs: 
    Current Language: English (US)
    CPU: 12x AMD Ryzen 5 2600 Six-Core Processor 
[04Aug2021 18:42:11.916] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:realStdoutPrintln:123]: #@!@# Game crashed! Crash report saved to: #@!@# C:\Users\Faro\Desktop\Faros-Vikings-Mod-1.16.5\Faros-Vikings-Mod-1.16.x\run\.\crash-reports\crash-2021-08-04_18.42.11-client.txt
 

 

[Faro]

bruh this was a line that I forgot to comment out ok now it works