---- Minecraft Crash Report ---- // But it works on my machine. Time: 2026-04-02 13:47:51 Description: Initializing game java.lang.NoClassDefFoundError: Could not initialize class icyllis.modernui.mc.MuiModApi at net.minecraft.client.util.Window.redirect$dpl000$modernui$onInit(Window.java:681) at net.minecraft.client.util.Window.(Window.java:105) at net.minecraft.client.util.WindowProvider.createWindow(WindowProvider.java:20) at net.minecraft.client.MinecraftClient.(MinecraftClient.java:504) at net.minecraft.client.main.Main.main(Main.java:234) at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:514) at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:72) at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at com.modrinth.theseus.MinecraftLaunch.relaunch(MinecraftLaunch.java:63) at com.modrinth.theseus.MinecraftLaunch.main(MinecraftLaunch.java:28) Caused by: java.lang.ExceptionInInitializerError: Exception java.util.NoSuchElementException: No value present [in thread "ForkJoinPool.commonPool-worker-2"] at java.base/java.util.Optional.orElseThrow(Unknown Source) at knot//icyllis.modernui.mc.MuiModApi.(MuiModApi.java:140) at net.minecraft.util.Formatting.byCode(Formatting.java:538) at knot//de.hysky.skyblocker.utils.TextTransformer.fromLegacy(TextTransformer.java:74) at knot//de.hysky.skyblocker.utils.TextTransformer.fromLegacy(TextTransformer.java:26) at knot//de.hysky.skyblocker.utils.EnchantedBookUtils.lambda$init$0(EnchantedBookUtils.java:25) at java.base/java.util.HashMap$Values.forEach(Unknown Source) at knot//de.hysky.skyblocker.utils.NEURepoManager.forEachItem(NEURepoManager.java:231) at knot//de.hysky.skyblocker.utils.EnchantedBookUtils.lambda$init$1(EnchantedBookUtils.java:18) at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(Unknown Source) at java.base/java.util.concurrent.CompletableFuture$Completion.exec(Unknown Source) at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source) at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source) at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source) at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source) at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source) A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Thread: Render thread Stacktrace: at knot//com.github.kd_gaming1.packcore.util.diagnostics.CrashReportEnricher.register(CrashReportEnricher.java:18) -- PackCore Diagnostics -- Details: Report: -- Modpack -- Name : Skyblock Enhanced Version : 3.0.6 Minecraft Version : 1.21.11 Author : KD1 Description : The ultimate modern Hypixel SkyBlock modpack — 60+ optimized mods, pre-configured for maximum FPS, clean UI, and zero setup. Install once, launch, and instantly get the smoothest SkyBlock experience possible. Modrinth ID : e0oMrxjp -- Config Pack -- Last Applied Version : 3.0.2 Last Applied File : 1080p_default_configs.zip -- Settings -- Menu Style : MINIMAL Wizard Complete : true Auto Backup : enabled (every 3 days) Last Backup : never -- Runtime -- RAM Allocated : 3072 MB RAM Used : 1019 MB Heap Used / Max : 1018 MB / 3072 MB CPU Cores : 12 Java Version : 21.0.10 JVM : OpenJDK 64-Bit Server VM Fabric Loader : 0.18.5 -- System -- OS : Linux 6.8.0-106-generic Architecture : amd64 CPU Load : 192.1% Physical RAM : 15169 MB Stacktrace: at knot//com.github.kd_gaming1.packcore.util.diagnostics.CrashReportEnricher.register(CrashReportEnricher.java:18) at net.minecraft.util.crash.CrashReport.handler$eje000$packcore$enrichCrashReport(CrashReport.java:1016) at net.minecraft.util.crash.CrashReport.(CrashReport.java:40) at net.minecraft.util.crash.CrashReport.create(CrashReport.java:225) at net.minecraft.client.main.Main.main(Main.java:240) at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:514) at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:72) at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at com.modrinth.theseus.MinecraftLaunch.relaunch(MinecraftLaunch.java:63) at com.modrinth.theseus.MinecraftLaunch.main(MinecraftLaunch.java:28) -- Initialization -- Details: Modules: -- System Details -- Details: Minecraft Version: 1.21.11 Minecraft Version ID: 1.21.11 Operating System: Linux (amd64) version 6.8.0-106-generic Java Version: 21.0.10, Azul Systems, Inc. Java VM Version: OpenJDK 64-Bit Server VM (mixed mode, sharing), Azul Systems, Inc. Memory: 804053304 bytes (766 MiB) / 1673527296 bytes (1596 MiB) up to 3221225472 bytes (3072 MiB) CPUs: 12 Processor Vendor: AuthenticAMD Processor Name: AMD Ryzen 5 6600H with Radeon Graphics Identifier: AuthenticAMD Family 25 Model 68 Stepping 1 Microarchitecture: Zen 3 Frequency (GHz): -0.00 Number of physical packages: 1 Number of physical CPUs: 6 Number of logical CPUs: 12 Graphics card #0 name: GA107M [GeForce RTX 3050 Mobile] Graphics card #0 vendor: NVIDIA Corporation (0x10de) Graphics card #0 VRAM (MiB): 4128.00 Graphics card #0 deviceId: 0x25a2 Graphics card #0 versionInfo: unknown Graphics card #1 name: Rembrandt [Radeon 680M] Graphics card #1 vendor: Advanced Micro Devices, Inc. [AMD/ATI] (0x1002) Graphics card #1 VRAM (MiB): 258.00 Graphics card #1 deviceId: 0x1681 Graphics card #1 versionInfo: unknown Virtual memory max (MiB): 9632.87 Virtual memory used (MiB): 10144.33 Swap memory total (MiB): 2048.00 Swap memory used (MiB): 325.75 Space in storage for jna.tmpdir (MiB): available: 45307.28, total: 195804.27 Space in storage for org.lwjgl.system.SharedLibraryExtractPath (MiB): available: 45307.28, total: 195804.27 Space in storage for io.netty.native.workdir (MiB): available: 45307.27, total: 195804.27 Space in storage for java.io.tmpdir (MiB): available: 1504.95, total: 1516.97 Space in storage for workdir (MiB): available: 45307.27, total: 195804.27 JVM Flags: 1 total; -Xmx3072M Debug Flags: 0 total; Fabric Mods: architectury: Architectury 19.0.1 authme: Auth Me 9.1.0+1.21.11 commons-logging_commons-logging: commons-logging 1.3.5 org_apache_httpcomponents_httpclient: httpclient 4.5.14 org_apache_httpcomponents_httpcore: httpcore 4.4.16 badoptimizations: BadOptimizations 2.4.1 bazaarutils: Bazaar Utils 0.6.2 com_moulberry_mixinconstraints: mixinconstraints 1.0.8 commons-codec_commons-codec: commons-codec 1.16.0 net_hypixel_hypixel-api-core: hypixel-api-core 4.4 net_hypixel_hypixel-api-transport-apache: hypixel-api-transport-apache 4.4 org_danilopianini_gson-extras: gson-extras 3.3.0 betterblockentities: BBE 1.3.0 betterf3: BetterF3 17.0.0 bobby: Bobby 5.2.11+mc1.21.11 com_typesafe_config: config 1.4.2 fabric-api-base: Fabric API Base 1.0.5+4ebb5c0853 io_leangen_geantyref_geantyref: geantyref 1.3.13 org_spongepowered_configurate-core: configurate-core 4.1.2 org_spongepowered_configurate-hocon: configurate-hocon 4.1.2 chatpatches: Chat Patches 8.0-alpha.8 cloth-config: Cloth Config v20 21.11.153 continuity: Continuity 3.0.1-beta.1+1.21.11 controlling: Controlling 29.0.1 cubes-without-borders: Cubes Without Borders 3.0.0-build.14+mc1.21.11 debugify: Debugify 1.21.11+1.0 emojitype: Emoji Type 3.0.0-1.21.10 org_yaml_snakeyaml: snakeyaml 2.5 entityculling: EntityCulling 1.10.0 fabric-api: Fabric API 0.141.3+1.21.11 fabric-api-lookup-api-v1: Fabric API Lookup API (v1) 1.6.114+20dc27073e fabric-biome-api-v1: Fabric Biome API (v1) 17.1.1+4fc5413f3e fabric-block-api-v1: Fabric Block API (v1) 1.1.10+4ebb5c083e fabric-block-view-api-v2: Fabric BlockView API (v2) 1.0.39+4ebb5c083e fabric-command-api-v2: Fabric Command API (v2) 2.4.7+6b42a6003e fabric-content-registries-v0: Fabric Content Registries (v0) 10.2.14+4fc5413f3e fabric-convention-tags-v1: Fabric Convention Tags 2.1.55+7f945d5b3e fabric-convention-tags-v2: Fabric Convention Tags (v2) 2.17.3+8ef948ba3e fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.3.23+4ebb5c083e fabric-data-attachment-api-v1: Fabric Data Attachment API (v1) 1.8.47+eed0806f3e fabric-data-generation-api-v1: Fabric Data Generation API (v1) 23.4.0+69974c4e3e fabric-dimensions-v1: Fabric Dimensions API (v1) 4.0.28+4fc5413f3e fabric-entity-events-v1: Fabric Entity Events (v1) 3.1.1+1d0ab4303e fabric-events-interaction-v0: Fabric Events Interaction (v0) 4.1.0+3b89ecf63e fabric-game-rule-api-v1: Fabric Game Rule API (v1) 2.0.3+4fc5413f3e fabric-item-api-v1: Fabric Item API (v1) 11.5.20+d0c46b9e3e fabric-item-group-api-v1: Fabric Item Group API (v1) 4.2.36+4fc5413f3e fabric-key-binding-api-v1: Fabric Key Binding API (v1) 1.1.7+4fc5413f3e fabric-lifecycle-events-v1: Fabric Lifecycle Events (v1) 2.6.15+4ebb5c083e fabric-loot-api-v2: Fabric Loot API (v2) 3.0.73+3f89f5a53e fabric-loot-api-v3: Fabric Loot API (v3) 2.0.20+78c8b4663e fabric-message-api-v1: Fabric Message API (v1) 6.1.12+4ebb5c083e fabric-model-loading-api-v1: Fabric Model Loading API (v1) 6.0.15+4fc5413f3e fabric-networking-api-v1: Fabric Networking API (v1) 5.1.5+ae1e07683e fabric-object-builder-api-v1: Fabric Object Builder API (v1) 21.1.39+4fc5413f3e fabric-particles-v1: Fabric Particles (v1) 4.2.11+4fc5413f3e fabric-recipe-api-v1: Fabric Recipe API (v1) 8.2.3+4ebb5c083e fabric-registry-sync-v0: Fabric Registry Sync (v0) 6.2.5+1718722b3e fabric-renderer-api-v1: Fabric Renderer API (v1) 8.0.3+f4ffd2e53e fabric-renderer-indigo: Fabric Renderer - Indigo 5.0.3+f4ffd2e53e fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 3.1.43+4ebb5c083e fabric-rendering-v1: Fabric Rendering (v1) 16.2.10+0290ad933e fabric-resource-conditions-api-v1: Fabric Resource Conditions API (v1) 5.0.35+4fc5413f3e fabric-resource-loader-v0: Fabric Resource Loader (v0) 3.3.4+4fc5413f3e fabric-resource-loader-v1: Fabric Resource Loader (v1) 1.0.10+78c8b4663e fabric-screen-api-v1: Fabric Screen API (v1) 3.1.7+4ebb5c083e fabric-screen-handler-api-v1: Fabric Screen Handler API (v1) 1.3.161+4fc5413f3e fabric-serialization-api-v1: Fabric Serialization API (v1) 1.0.5+4ebb5c083e fabric-sound-api-v1: Fabric Sound API (v1) 1.0.51+4fc5413f3e fabric-tag-api-v1: Fabric Tag API (v1) 1.2.20+4fc5413f3e fabric-transfer-api-v1: Fabric Transfer API (v1) 6.0.25+4fc5413f3e fabric-transitive-access-wideners-v1: Fabric Transitive Access Wideners (v1) 7.1.0+014c8cec3e fabric-language-kotlin: Fabric Language Kotlin 1.13.10+kotlin.2.3.20 org_jetbrains_kotlin_kotlin-reflect: kotlin-reflect 2.3.20 org_jetbrains_kotlin_kotlin-stdlib: kotlin-stdlib 2.3.20 org_jetbrains_kotlin_kotlin-stdlib-jdk7: kotlin-stdlib-jdk7 2.3.20 org_jetbrains_kotlin_kotlin-stdlib-jdk8: kotlin-stdlib-jdk8 2.3.20 org_jetbrains_kotlinx_atomicfu-jvm: atomicfu-jvm 0.32.1 org_jetbrains_kotlinx_kotlinx-coroutines-core-jvm: kotlinx-coroutines-core-jvm 1.10.2 org_jetbrains_kotlinx_kotlinx-coroutines-jdk8: kotlinx-coroutines-jdk8 1.10.2 org_jetbrains_kotlinx_kotlinx-datetime-jvm: kotlinx-datetime-jvm 0.7.1 org_jetbrains_kotlinx_kotlinx-io-bytestring-jvm: kotlinx-io-bytestring-jvm 0.9.0 org_jetbrains_kotlinx_kotlinx-io-core-jvm: kotlinx-io-core-jvm 0.9.0 org_jetbrains_kotlinx_kotlinx-serialization-cbor-jvm: kotlinx-serialization-cbor-jvm 1.10.0 org_jetbrains_kotlinx_kotlinx-serialization-core-jvm: kotlinx-serialization-core-jvm 1.10.0 org_jetbrains_kotlinx_kotlinx-serialization-json-jvm: kotlinx-serialization-json-jvm 1.10.0 fabricloader: Fabric Loader 0.18.5 mixinextras: MixinExtras 0.5.3 ferritecore: FerriteCore 8.2.0 firmament: Firmament 44.0.1+mc1.21.11 cloth-basic-math: cloth-basic-math 0.6.1 jarviscci: Jarvis Common Config Index 2.1.0 mm_shedaniel: Manningham Mills (shedaniel's fork) 2.4.1 forcecloseworldloadingscreen: kennytv's epic force close loading screen mod for Fabric 2.3.4 forgeconfigapiport: Forge Config API Port 21.11.1 com_electronwill_night-config_core: core 3.8.3 com_electronwill_night-config_toml: toml 3.8.3 fzzy_config: Fzzy Config 0.7.6+1.21.11 blue_endless_jankson: jankson 1.2.3 fabric-permissions-api-v0: fabric-permissions-api 0.6.1 net_peanuuutz_tomlkt_tomlkt-jvm: tomlkt-jvm 0.3.7 holdmyitems: Hold My Items 5.1 org_luaj_luaj-jse: luaj-jse 3.0.1 immediatelyfast: ImmediatelyFast 1.14.2+1.21.11 net_lenni0451_reflect: Reflect 1.6.1+curseforge iris: Iris 1.10.7+mc1.21.11 io_github_douira_glsl-transformer: glsl-transformer 3.0.0-pre3 org_anarres_jcpp: jcpp 1.4.14 org_antlr_antlr4-runtime: antlr4-runtime 4.13.1 java: OpenJDK 64-Bit Server VM 21 krypton: Krypton 0.2.10 com_velocitypowered_velocity-native: velocity-native 3.4.0-SNAPSHOT languagereload: Language Reload 1.7.6+1.21.11 libjf: LibJF 3.19.11 libjf-base: LibJF Base 3.19.11 libjf-config-commands: LibJF Config Commands 3.19.11 libjf-config-core-v2: LibJF Config 3.19.11 libjf-config-network-v0: LibJF Config: Network 3.19.11 libjf-config-ui-tiny: LibJF Config UI: Tiny 3.19.11 libjf-data-manipulation-v0: LibJF Data Manipulation 3.19.11 libjf-data-v0: LibJF Data 3.19.11 libjf-mainhttp-v0: LibJF MainHTTP 3.19.11 libjf-resource-pack-entry-widgets-v0: LibJF Resource Pack Entry Widgets 3.19.11 libjf-translate-v1: LibJF Translate 3.19.11 libjf-unsafe-v0: LibJF Unsafe 3.19.11 libjf-web-v1: LibJF Web 3.19.11 lithium: Lithium 0.21.4+mc1.21.11 minecraft: Minecraft 1.21.11 modernfix: ModernFix 5.26.2-build.1 modernui: Modern UI **.**.**.**-build.4+mc1.21.11 org_commonmark_commonmark: commonmark 0.25.0 modernwarpmenu: Modern Warp Menu 0.1.9+1.21.11 conditional-mixin: conditional mixin 0.6.4 net_hypixel_mod-api: mod-api 1.0.1 modmenu: Mod Menu 17.0.0 moreculling: More Culling 1.6.2 mixinsquared: MixinSquared 0.2.0 nochatreports: No Chat Reports 1.21.11-v2.18.0 nofrills: NoFrills 0.4.10 de_topobyte_jama: jama 1.1.0 meteordevelopment_orbit: orbit 0.2.4 odin: Odin 0.1.8 com_github_stivais_commodore: Commodore 1.0.1 org_lwjgl_lwjgl-nanovg: lwjgl-nanovg 3.3.3 org_lwjgl_lwjgl-nanovg_natives-linux: lwjgl-nanovg 3.3.3 org_lwjgl_lwjgl-nanovg_natives-macos: lwjgl-nanovg 3.3.3 org_lwjgl_lwjgl-nanovg_natives-macos-arm64: lwjgl-nanovg 3.3.3 org_lwjgl_lwjgl-nanovg_natives-windows: lwjgl-nanovg 3.3.3 owo: oωo 0.13.0+1.21.11 com_github_kdl-org_kdl4j: kdl4j 1.0.1 io_wispforest_endec: endec 0.1.12 io_wispforest_endec_gson: gson 0.1.7 io_wispforest_endec_jankson: jankson 0.1.7 io_wispforest_endec_netty: netty 0.1.6 packcore: Pack Core 4.2.1 midnightlib: MidnightLib 1.9.2 particle_core: Particle Core 0.3.2+1.21.11 placeholder-api: Placeholder API 2.8.2+1.21.10 rei_search_bar_calculations: REI Search Bar Calculations 1.1.0+1.21.6-10 respackopts: Resource Pack Options 4.14.2 io_gitlab_jfronny_muscript-all: muscript-all 1.8.0-SNAPSHOT io_gitlab_jfronny_muscript-json: muscript-json 1.8.0-SNAPSHOT roughlyenoughitems: Roughly Enough Items 21.11.814 error_notifier: Error Notifier 1.0.11 sbo-kotlin: SBO 0.2.1-beta elementa: Elementa 714 resourcefulconfig: Resourcefulconfig 3.11.2 resourcefulconfigkt: Resourceful Config Kotlin 3.11.0 universalcraft: UniversalCraft 453 scaleme: ScaleMe 3.0.0 scamscreener: ScamScreener 2.1.3+1.21.11 searchables: Searchables 1.0.4 skinlayers3d: 3d-Skin-Layers 1.11.0 skyblock_enhancements: SkyBlock Enhancements 0.9.0 skyblocker: Skyblocker 6.2.0+1.21.11 dandelion: Dandelion 1.0.0-alpha.15+1.21.11 hm-api: HM Api 1.0.2+1.21.11 meteordevelopment_discord-ipc: discord-ipc 1.1 moe_nea_neurepoparser: neurepoparser 1.9.0 net_azureaaron_legacy-item-dfu: legacy-item-dfu 1.0.3+1.21.5 net_azureaaron_networth-calculator: networth-calculator 1.0.5 org_apache_commons_commons-math3: commons-math3 3.6.1 org_apache_commons_commons-text: commons-text 1.15.0 org_eclipse_jgit_org_eclipse_jgit: org.eclipse.jgit 7.4.0.202509020913-r skyblockpv: SkyBlock Profile Viewer 1.7.3 olympus: Olympus 1.7.0 resourcefullib: Resourceful Lib 3.11.0 com_teamresourceful_bytecodecs: bytecodecs 1.1.3 com_teamresourceful_yabn: yabn 1.0.3 skyhanni: SkyHanni 7.13.0 com_notkamui_libs_keval-jvm: keval-jvm 1.1.1 commons-net_commons-net: commons-net 3.11.1 hypixel-mod-api: Hypixel Mod API 1.0.1+build.1+mc1.21 libninepatch: LibNinePatch 1.2.0 skyocean: SkyOcean 1.13.2 meowdding-lib: Meowdding-Lib 4.0.8 me_owdding_repo_remote-repo: remote-repo 1.0.9 meowdding-patches: Meowdding-Patches 1.0.8 skyblock-api: skyblock-api 4.0.12 meowdding-item-dfu: Meowdding Item Dfu 1.0.8 tech_thatgravyboat_repo-lib_repo-lib: repo-lib 3.0.2 sodium: Sodium 0.8.7+mc1.21.11 sodium-extra: Sodium Extra 0.8.3+mc1.21.11 soundcontroller: Sound Controller 1.2.4 sspb: Sodium Shadowy Path Blocks 6.0.0 uilib: UI Lib 19.1.0 waveycapes: WaveyCapes 1.9.0 transition: TRansition 1.0.15 trender: TRender 1.0.11 yet_another_config_lib_v3: YetAnotherConfigLib 3.8.2+1.21.11-fabric com_twelvemonkeys_common_common-image: common-image 3.12.0 com_twelvemonkeys_common_common-io: common-io 3.12.0 com_twelvemonkeys_common_common-lang: common-lang 3.12.0 com_twelvemonkeys_imageio_imageio-core: imageio-core 3.12.0 com_twelvemonkeys_imageio_imageio-metadata: imageio-metadata 3.12.0 com_twelvemonkeys_imageio_imageio-webp: imageio-webp 3.12.0 org_quiltmc_parsers_gson: gson 0.2.1 org_quiltmc_parsers_json: json 0.2.1 zoomify: Zoomify 2.15.2+1.21.11 com_akuleshov7_ktoml-core-jvm: ktoml-core-jvm 0.7.1 Launched Version: 1.21.11 Launcher name: theseus Backend library: LWJGL version 3.3.3-snapshot Backend API: Unknown Window size: GFLW Platform: x11 Render Extensions: ERR GL debug messages: Is Modded: Definitely; Client brand changed to 'fabric' Universe: 404 Type: Client (map_client.txt) Locale: en_GB System encoding: UTF-8 File encoding: UTF-8 CPU: 12x AMD Ryzen 5 6600H with Radeon Graphics