Start script generated by ServerPackCreator dev.
To change the launch settings of this server, such as JVM args / flags, Minecraft version, modloader version etc., edit the variables.txt-file.
Detected 1.21.11 - Java 21
Running Fabric checks and setup...
fabric-server-launcher.jar present. Moving on...
Starting server...
Minecraft version:              1.21.11
Modloader:                      Fabric
Modloader version:              0.19.5
LegacyFabric Installer Version: 1.1.1
Fabric Installer Version:       1.1.2
Quilt Installer Version:        0.15.1
Java Args:                      
Additional Args:                -Dlog4j2.formatMsgNoLookups=true
SSJ Forge Args:                 -Djava.security.manager=allow
Java Path:                      /opt/java-21/bin/java
Wait For User Input:            false
Launcher JAR:                   fabric-server-launcher.jar
Run Command:       /opt/java-21/bin/java -Dlog4j2.formatMsgNoLookups=true  -jar fabric-server-launcher.jar nogui
Java version:
openjdk version "21.0.12.1" 2026-08-18 LTS
OpenJDK Runtime Environment Temurin-21.0.12.1+1 (build 21.0.12.1+1-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.12.1+1 (build 21.0.12.1+1-LTS, mixed mode, sharing)
Starting net.fabricmc.loader.impl.game.minecraft.BundlerClassPathCapture
[22:10:12] [main/INFO]: Loading Minecraft 1.21.11 with Fabric Loader 0.19.5
[22:10:12] [main/INFO]: Loading 42 mods:
	- fabric-api 0.141.6+1.21.11
	   |-- fabric-api-base 1.0.5+4ebb5c083e
	   |-- fabric-api-lookup-api-v1 1.6.114+20dc27073e
	   |-- fabric-biome-api-v1 17.1.1+4fc5413f3e
	   |-- fabric-block-api-v1 1.1.10+4ebb5c083e
	   |-- fabric-block-view-api-v2 1.0.39+4ebb5c083e
	   |-- fabric-command-api-v2 2.4.7+6b42a6003e
	   |-- fabric-content-registries-v0 10.2.14+4fc5413f3e
	   |-- fabric-convention-tags-v1 2.1.55+7f945d5b3e
	   |-- fabric-convention-tags-v2 2.17.3+8ef948ba3e
	   |-- fabric-crash-report-info-v1 0.3.23+4ebb5c083e
	   |-- fabric-data-attachment-api-v1 1.8.48+eed0806f3e
	   |-- fabric-data-generation-api-v1 23.5.0+88d7da613e
	   |-- fabric-dimensions-v1 4.0.28+4fc5413f3e
	   |-- fabric-entity-events-v1 3.1.1+1d0ab4303e
	   |-- fabric-events-interaction-v0 4.1.1+3b89ecf63e
	   |-- fabric-game-rule-api-v1 2.0.3+4fc5413f3e
	   |-- fabric-item-api-v1 11.6.0+67f17bb43e
	   |-- fabric-item-group-api-v1 4.2.36+4fc5413f3e
	   |-- fabric-lifecycle-events-v1 2.6.15+4ebb5c083e
	   |-- fabric-loot-api-v2 3.0.73+3f89f5a53e
	   |-- fabric-loot-api-v3 2.0.20+78c8b4663e
	   |-- fabric-message-api-v1 6.1.12+4ebb5c083e
	   |-- fabric-networking-api-v1 5.1.6+6b6d71a53e
	   |-- fabric-object-builder-api-v1 21.1.40+4fc5413f3e
	   |-- fabric-particles-v1 4.2.12+4fc5413f3e
	   |-- fabric-recipe-api-v1 8.2.4+4ebb5c083e
	   |-- fabric-registry-sync-v0 6.2.6+1718722b3e
	   |-- fabric-rendering-fluids-v1 3.1.43+4ebb5c083e
	   |-- fabric-resource-conditions-api-v1 5.0.35+4fc5413f3e
	   |-- fabric-resource-loader-v0 3.3.4+4fc5413f3e
	   |-- fabric-resource-loader-v1 1.0.10+78c8b4663e
	   |-- fabric-screen-handler-api-v1 1.3.162+4fc5413f3e
	   |-- fabric-serialization-api-v1 1.0.5+4ebb5c083e
	   |-- fabric-tag-api-v1 1.3.0+88d7da613e
	   |-- fabric-transfer-api-v1 6.0.25+4fc5413f3e
	   \-- fabric-transitive-access-wideners-v1 7.1.0+014c8cec3e
	- fabricloader 0.19.5
	   \-- mixinextras 0.5.5
	- improperui 1.21.11-0.0.7-BETA
	- java 21
	- minecraft 1.21.11
[22:10:12] [main/INFO]: SpongePowered MIXIN Subsystem Version=0.8.7 Source=file:/srv/pack/libraries/net/fabricmc/sponge-mixin/0.17.4+mixin.0.8.7/sponge-mixin-0.17.4+mixin.0.8.7.jar Service=Knot/Fabric Env=SERVER
[22:10:13] [main/INFO]: Initializing MixinExtras via com.llamalad7.mixinextras.service.MixinExtrasServiceImpl(version=0.5.5).
[22:10:22] [main/ERROR]: Failed to start the minecraft server
java.lang.RuntimeException: Could not execute entrypoint stage 'main' due to errors, provided by 'improperui' at 'io.github.itzispyder.improperui.ImproperUI'!
	at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$0(FabricLoaderImpl.java:413)
	at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
	at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:411)
	at net.fabricmc.loader.impl.game.minecraft.Hooks.startServer(Hooks.java:63)
	at knot//net.minecraft.server.Main.main(Main.java:112)
	at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:517)
	at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:72)
	at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23)
	at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69)
	at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/class_304
	at knot//io.github.itzispyder.improperui.ImproperUI.<clinit>(ImproperUI.java:14)
	at java.base/java.lang.Class.forName0(Native Method)
	at java.base/java.lang.Class.forName(Class.java:536)
	at java.base/java.lang.Class.forName(Class.java:515)
	at net.fabricmc.loader.impl.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:53)
	at net.fabricmc.loader.impl.entrypoint.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:124)
	at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53)
	at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:409)
	... 7 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.class_304
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:239)
	at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	... 15 more
Exiting...