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 1.21.1 - Java 21 Running NeoForge checks and setup... Generating user_jvm_args.txt from variables... Edit JAVA_ARGS in your variables.txt. Do not edit user_jvm_args.txt directly! Manually made changes to user_jvm_args.txt will be lost in the nether! server.jar present. Starting server... Minecraft version: 1.21.1 Modloader: NeoForge Modloader version: 21.1.251 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 Run Command: /opt/java-21/bin/java -Dlog4j2.formatMsgNoLookups=true @user_jvm_args.txt -jar server.jar --installer-force --installer 21.1.251 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) [13:34:44.986] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, forgeserver, --fml.neoForgeVersion, 21.1.251, --fml.fmlVersion, 4.0.44, --fml.mcVersion, 1.21.1, --fml.neoFormVersion, 20240808.144430, nogui] [13:34:44.989] [main/INFO] [Launcher/MODLAUNCHER]: JVM identified as Eclipse Adoptium OpenJDK 64-Bit Server VM 21.0.12.1+1-LTS [13:34:44.991] [main/INFO] [Launcher/MODLAUNCHER]: ModLauncher 11.0.5+main.901c6ea8 starting: java version 21.0.12.1 by Eclipse Adoptium; OS Linux arch amd64 version 5.15.0-1114-realtime Exception in thread "main" java.lang.NoClassDefFoundError: org/lwjgl/Version at LAYER SERVICE/sodium_service@0.8.13+mc1.21.1/net.caffeinemc.mods.sodium.client.compatibility.checks.PreLaunchChecks.isUsingKnownCompatibleLwjglVersion(PreLaunchChecks.java:136) at LAYER SERVICE/sodium_service@0.8.13+mc1.21.1/net.caffeinemc.mods.sodium.client.compatibility.checks.PreLaunchChecks.checkLwjglRuntimeVersion(PreLaunchChecks.java:30) at LAYER SERVICE/sodium_service@0.8.13+mc1.21.1/net.caffeinemc.mods.sodium.client.compatibility.checks.PreLaunchChecks.checkEnvironment(PreLaunchChecks.java:25) at LAYER SERVICE/sodium_service@0.8.13+mc1.21.1/net.caffeinemc.mods.sodium.service.SodiumWorkarounds.bootstrap(SodiumWorkarounds.java:19) at MC-BOOTSTRAP/fml_loader@4.0.44/net.neoforged.fml.loading.ImmediateWindowHandler.lambda$load$2(ImmediateWindowHandler.java:47) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base/java.util.ServiceLoader$ProviderSpliterator.tryAdvance(ServiceLoader.java:1499) at java.base/java.util.Spliterator.forEachRemaining(Spliterator.java:332) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at MC-BOOTSTRAP/fml_loader@4.0.44/net.neoforged.fml.loading.ImmediateWindowHandler.load(ImmediateWindowHandler.java:45) at MC-BOOTSTRAP/fml_loader@4.0.44/net.neoforged.fml.loading.ModDirTransformerDiscoverer.earlyInitialization(ModDirTransformerDiscoverer.java:42) at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.5/cpw.mods.modlauncher.TransformationServicesHandler.lambda$discoverServices$17(TransformationServicesHandler.java:125) at java.base/java.lang.Iterable.forEach(Iterable.java:75) at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.5/cpw.mods.modlauncher.TransformationServicesHandler.discoverServices(TransformationServicesHandler.java:125) at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.5/cpw.mods.modlauncher.Launcher.run(Launcher.java:83) at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.5/cpw.mods.modlauncher.Launcher.main(Launcher.java:74) at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.5/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) at MC-BOOTSTRAP/cpw.mods.modlauncher@11.0.5/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) at cpw.mods.bootstraplauncher@2.0.2/cpw.mods.bootstraplauncher.BootstrapLauncher.run(BootstrapLauncher.java:210) at cpw.mods.bootstraplauncher@2.0.2/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:69) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) at java.base/java.lang.reflect.Method.invoke(Method.java:580) at net.neoforged.serverstarterjar.Main.mainLaunch(Main.java:306) at net.neoforged.serverstarterjar.Main.main(Main.java:76) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) at java.base/java.lang.reflect.Method.invoke(Method.java:580) at net.neoforged.serverstarterjar.Main8.main(Main8.java:19) Caused by: java.lang.ClassNotFoundException: org.lwjgl.Version at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:216) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) at cpw.mods.securejarhandler/cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:216) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526) ... 33 more Exiting...