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DateTime: 18.01.2026 15:13:34:038 +01:00; PID: 9236
This file contains the stderr stream of the Minecraft process logged to a file.
It does not include stdout or log (log4j) messages to avoid performance impact.
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[15:13:43:857] [STDERR]: Exception in thread "main" org.spongepowered.asm.launch.MixinInitialisationError: Mixin config merenc.mixins.json specifies compatibility level JAVA_21 which is not recognised
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinConfig.initCompatibilityLevel(MixinConfig.java:519)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinConfig.postInit(MixinConfig.java:502)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinConfig.onLoad(MixinConfig.java:430)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.MixinConfig.create(MixinConfig.java:1293)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.transformer.Config.create(Config.java:148)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.Mixins.createConfiguration(Mixins.java:100)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.mixin.Mixins.addConfiguration(Mixins.java:87)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinPlatformManager.addConfig(MixinPlatformManager.java:262)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinPlatformAgentDefault.prepare(MixinPlatformAgentDefault.java:46)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinContainer.prepare(MixinContainer.java:122)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinPlatformManager.createContainerFor(MixinPlatformManager.java:144)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinPlatformManager.addContainer(MixinPlatformManager.java:134)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinPlatformManager.addNestedContainers(MixinPlatformManager.java:152)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinPlatformManager.scanForContainers(MixinPlatformManager.java:213)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.platform.MixinPlatformManager.inject(MixinPlatformManager.java:186)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinBootstrap.inject(MixinBootstrap.java:202)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinLaunchPluginLegacy.initializeLaunch(MixinLaunchPluginLegacy.java:201)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/org.spongepowered.mixin/org.spongepowered.asm.launch.MixinLaunchPlugin.initializeLaunch(MixinLaunchPlugin.java:34)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.LaunchPluginHandler.lambda$announceLaunch$11(LaunchPluginHandler.java:100)
[15:13:43:857] [STDERR]: at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.LaunchPluginHandler.announceLaunch(LaunchPluginHandler.java:100)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:51)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.Launcher.run(Launcher.java:108)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.Launcher.main(Launcher.java:78)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
[15:13:43:857] [STDERR]: at MC-BOOTSTRAP/cpw.mods.modlauncher@10.0.9/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
[15:13:43:857] [STDERR]: at cpw.mods.bootstraplauncher@1.1.2/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141)