A mod crashed on startup!
net.fabricmc.loader.impl.FormattedException: java.lang.RuntimeException: Could not execute entrypoint stage 'preLaunch' due to errors, provided by 'advanced_runtime_resource_pack' at 'net.devtech.arrp.ARRP'!
at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:162)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:243)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:278)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)
Caused by: java.lang.RuntimeException: Could not execute entrypoint stage 'preLaunch' due to errors, provided by 'advanced_runtime_resource_pack' at 'net.devtech.arrp.ARRP'!
at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$2(FabricLoaderImpl.java:403)
at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:401)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:160)
... 8 more
Caused by: net.fabricmc.loader.api.EntrypointException: Exception while loading entries for entrypoint 'preLaunch' provided by 'advanced_runtime_resource_pack'
at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:56)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:399)
... 9 more
Caused by: java.lang.RuntimeException: Mixin transformation of net.devtech.arrp.ARRP failed
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:534)
at java.base/java.lang.Class.forName(Class.java:513)
at net.fabricmc.loader.impl.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50)
at net.fabricmc.loader.impl.entrypoint.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:124)
at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53)
... 10 more
Caused by: java.lang.NoClassDefFoundError: me/fzzyhmstrs/fzzy_config/config_util/SyncedConfigHelperV1
at knot//me.fzzyhmstrs.particle_core.PcConfig.(PcConfig.kt:35)
at knot//me.fzzyhmstrs.particle_core.plugin.PcConditionTester.isSatisfied(PcConditionTester.java:9)
at knot//me.fallenbreath.conditionalmixin.impl.SimpleRestrictionChecker.checkConditions(SimpleRestrictionChecker.java:154)
at knot//me.fallenbreath.conditionalmixin.impl.SimpleRestrictionChecker.checkRestriction(SimpleRestrictionChecker.java:53)
at knot//me.fallenbreath.conditionalmixin.impl.MemorizedRestrictionChecker.checkRestriction(MemorizedRestrictionChecker.java:30)
at knot//me.fallenbreath.conditionalmixin.api.mixin.RestrictiveMixinConfigPlugin.shouldApplyMixin(RestrictiveMixinConfigPlugin.java:33)
at org.spongepowered.asm.mixin.transformer.PluginHandle.shouldApplyMixin(PluginHandle.java:132)
at org.spongepowered.asm.mixin.transformer.MixinInfo.shouldApplyMixin(MixinInfo.java:987)
at org.spongepowered.asm.mixin.transformer.MixinInfo.readDeclaredTargets(MixinInfo.java:952)
at org.spongepowered.asm.mixin.transformer.MixinInfo.(MixinInfo.java:881)
at org.spongepowered.asm.mixin.transformer.MixinConfig.prepareMixins(MixinConfig.java:933)
at org.spongepowered.asm.mixin.transformer.MixinConfig.prepare(MixinConfig.java:862)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:540)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:462)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:438)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:290)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422)
... 20 more
Caused by: java.lang.ClassNotFoundException: me.fzzyhmstrs.fzzy_config.config_util.SyncedConfigHelperV1
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:226)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
... 39 more

If you can try removing/disabling ARRP and the mods dependent on it and see if it works. If that doesn't work try removing/disabling all resource packs and try again.

Also what mod version are you using?

If you can try removing/disabling ARRP and the mods dependent on it and see if it works. If that doesn't work try removing/disabling all resource packs and try again.

Also what mod version are you using?

i fixed it, did some more testing and discovered it was another mod problem, fix was updating my Particle Core version.