Hello, I am trying to load up my mods that I use for PVP in 1.8.9 and I keep receiving this crash report after each time that I try to launch minecraft.

I used to be able to play with all my PVP mods with no problems but after switching out my 1.8.9 mods with my 1.16.2 mods to play with my friends in our realms, and back to 1.8.9 for PVP on Hypixel, something went wrong with my mods and I've been receiving crash reports. I've also tried going back and reinstall all the mods that I used to their latest versions but I'm still not sure what the problem is...

Please help, I'd really appreciate it.

 

The game crashed whilst there was a severe problem during mod loading that has caused the game to fail
Error: net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiNewChat

 

Here is the crash report:

 

---- Minecraft Crash Report ----

WARNING: coremods are present:
  FMLLoadingPlugin (Better FPS Limiter-1.0 (1.8.9).jar)
  CTJSLoadingPlugin (ctjs-1.2.2-1.8.9 (1).jar)
  OptifinePatcherTweaker (Patcher-1.2 (1.8.9).jar)
  FMLLoadingPlugin (MemoryFix-0.3.jar)
  FMLLoadingPlugin (OofMod-2.0.2 (1.8.9).jar)
  OldAnimationsModCore (OldAnimationsMod-Animations & Gadgets_2.6.1-mc_Forge1.8.9.jar)
  PatcherTweaker (Patcher-1.2 (1.8.9).jar)
  FMLLoadingPlugin (AutoGG-3.5 (1.8.9).jar)
  FMLLoadingPlugin (MouseDelayFix-1.0.jar)
  PlayerAPIPlugin (PlayerAPI-1.8.9-1.0.jar)
  FMLLoadingPlugin (Levelhead-7.0.3 (1.8.9).jar)
Contact their authors BEFORE contacting forge

// I let you down. Sorry

Time: 24/08/20 12:53 AM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiNewChat
    at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:162)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:559)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:417)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:329)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiNewChat
    at com.orangemarshall.enhancements.Enhancements.preInit(Enhancements.java:63)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:560)
    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:556)
    ... 10 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.gui.GuiNewChat
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 37 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
    at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:521)
    at org.spongepowered.asm.mixin.transformer.Proxy.transform(Proxy.java:72)
    at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
    ... 39 more
Caused by: org.spongepowered.asm.mixin.throwables.MixinApplyError: Mixin [mixins.json:MixinGuiChatNew] from phase [DEFAULT] in config [mixins.json] FAILED during APPLY
    at org.spongepowered.asm.mixin.transformer.MixinTransformer.handleMixinError(MixinTransformer.java:779)
    at org.spongepowered.asm.mixin.transformer.MixinTransformer.handleMixinApplyError(MixinTransformer.java:732)
    at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:513)
    ... 42 more
Caused by: org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException: Implicit variable modifier injection failed in net/minecraft/client/gui/GuiNewChat::localvar$getComponent$zzn000
    at org.spongepowered.asm.mixin.injection.modify.ModifyVariableInjector.inject(ModifyVariableInjector.java:168)
    at org.spongepowered.asm.mixin.injection.code.Injector.inject(Injector.java:200)
    at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.inject(InjectionInfo.java:267)
    at org.spongepowered.asm.mixin.transformer.MixinTargetContext.applyInjections(MixinTargetContext.java:1199)
    at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyInjections(MixinApplicatorStandard.java:939)
    at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:323)
    at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:281)
    at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:353)
    at org.spongepowered.asm.mixin.transformer.MixinTransformer.apply(MixinTransformer.java:724)
    at org.spongepowered.asm.mixin.transformer.MixinTransformer.applyMixins(MixinTransformer.java:703)
    at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:509)
    ... 42 more
Caused by: org.spongepowered.asm.mixin.injection.modify.InvalidImplicitDiscriminatorException: Found 0 candidate variables but exactly 1 is required.
    at org.spongepowered.asm.mixin.injection.modify.LocalVariableDiscriminator.findImplicitLocal(LocalVariableDiscriminator.java:343)
    at org.spongepowered.asm.mixin.injection.modify.LocalVariableDiscriminator.findLocal(LocalVariableDiscriminator.java:314)
    at org.spongepowered.asm.mixin.injection.modify.ModifyVariableInjector.inject(ModifyVariableInjector.java:159)
    ... 52 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
    ct.js modules: [Module{name=CustomRank,folder=.\config\ChatTriggers\modules\CustomRank,metadata=ModuleMetadata(name=CustomRank, version=1.5, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Shit module, shit idea, shit shit., requires=[SettingsManager], ignored=null, isRequired=false)}, Module{name=SettingsManager,folder=.\config\ChatTriggers\modules\SettingsManager,metadata=ModuleMetadata(name=SettingsManager, version=1.13, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Autogenerates a settings file and gui based on the object created and registers. Example usage can be found in UseExample.js, requires=null, ignored=null, isRequired=false)}]
    Minecraft Version: 1.8.9
    Operating System: Windows 10 (amd64) version 10.0
    CPU: 8x AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx 
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 451177072 bytes (430 MB) / 1073741824 bytes (1024 MB) up to 3221225472 bytes (3072 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.19 Powered by Forge 11.15.1.2318 Optifine OptiFine_1.8.9_HD_U_I7 28 mods loaded, 28 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UCH    mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
    UCH    FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.2318-1.8.9.jar) 
    UCH    Forge{11.15.1.2318} [Minecraft Forge] (forge-1.8.9-11.15.1.2318-1.8.9.jar) 
    UCH    mousedelayfix{1.0} [MouseDelayFix] (minecraft.jar) 
    UCH    oldanimations{2.6.1} [OldAnimationsMod] (minecraft.jar) 
    UCH    PlayerAPI{1.0} [Player API] (minecraft.jar) 
    UCH    level_head{7.0.3} [Sk1er Level Head] (minecraft.jar) 
    UCH    autotip{3.0.1} [Autotip] (Autotip-3.0.1 [1.8-1.12.2].jar) 
    UCH    modcore{0.1.40} [ModCore] (Sk1er Modcore-0.1.40 (1.8.9).jar) 
    UCH    fpsdisplaymod{1.0} [FPSDisplayMod] ([1.8.9] CheatBreakerHUD v3.jar) 
    UCH    cpsmod{1.0} [CPSMod] ([1.8.9] CheatBreakerHUD v3.jar) 
    UCH    keystrokesmod{0.1} [KeystrokesMod] ([1.8.9] CheatBreakerHUD v3.jar) 
    UCH    ToggleSneak{3.1.4} [ToggleSneak] ([1.8.9] Powns ToggleSneak Edit.jar) 
    UCH    sidebarmod{2.0} [Sidebar Mod Revamp] ([1.8.9] Sidebar Mod Revamp.jar) 
    UCH    particlemod{1.02} [Particle Mod] ([1.8.9]ParticleMod-1.02.jar) 
    UCH    autogg{3.5} [AutoGG] (AutoGG-3.5 (1.8.9).jar) 
    UCH    sk1er-bedwars_resource_display{1.0} [Bedwars Resource Display Mod] (Bedwars Resource Display-1.0 (1.8.9).jar) 
    UCH    better_fps_limiter{1.0} [Better FPS Limiter] (Better FPS Limiter-1.0 (1.8.9).jar) 
    UCH    blctimers{1.3} [BLC Timers] (blctimers-1.3.jar) 
    UCH    blockoverlay{3.2} [Block Overlay] (Block_Overlay_3.2.jar) 
    UCH    chatbackground{1.1} [Chat Background] (ChatBackground-v1.1.jar) 
    UCH    ct.js{1.2.2} [ChatTriggers] (ctjs-1.2.2-1.8.9 (1).jar) 
    UCH    memoryfix{0.3} [MemoryFix] (MemoryFix-0.3.jar) 
    UCH    refractionoof{2.0.2} [OofMod] (OofMod-2.0.2 (1.8.9).jar) 
    UCH    patcher{1.2} [Patcher] (Patcher-1.2 (1.8.9).jar) 
    UCH    quickplay{2.0.3} [Quickplay] (Quickplay-1.8.9-2.0.3.jar) 
    UCH    timechanger{1.0} [TimeChanger] (TimeChanger-1.0 (1.8.9).jar) 
    UCE    enhancements{7.7} [Vanilla Enhancements] (Vanilla+Enhancements-7.7.jar) 
    Loaded coremods (and transformers): 
FMLLoadingPlugin (Better FPS Limiter-1.0 (1.8.9).jar)
  club.sk1er.mods.betterfpslimit.forge.ClassTransformer
CTJSLoadingPlugin (ctjs-1.2.2-1.8.9 (1).jar)
  com.chattriggers.ctjs.launch.plugin.CTJSTransformer
OptifinePatcherTweaker (Patcher-1.2 (1.8.9).jar)
  club.sk1er.patcher.tweaker.optifine.OptifineClassTransformer
FMLLoadingPlugin (MemoryFix-0.3.jar)
  io.prplz.memoryfix.ClassTransformer
FMLLoadingPlugin (OofMod-2.0.2 (1.8.9).jar)
  
OldAnimationsModCore (OldAnimationsMod-Animations & Gadgets_2.6.1-mc_Forge1.8.9.jar)
  com.spiderfrog.oldanimations.main.ClassTransformer
  com.spiderfrog.gadgets.main.ClassTransformer
PatcherTweaker (Patcher-1.2 (1.8.9).jar)
  club.sk1er.mods.core.forge.ClassTransformer
  club.sk1er.patcher.tweaker.ClassTransformer
FMLLoadingPlugin (AutoGG-3.5 (1.8.9).jar)
  club.sk1er.mods.core.forge.ClassTransformer
FMLLoadingPlugin (MouseDelayFix-1.0.jar)
  io.prplz.mousedelayfix.ClassTransformer
PlayerAPIPlugin (PlayerAPI-1.8.9-1.0.jar)
  api.player.forge.PlayerAPITransformer
FMLLoadingPlugin (Levelhead-7.0.3 (1.8.9).jar)
  club.sk1er.mods.levelhead.forge.transform.ClassTransformer
    GL info: ' Vendor: 'ATI Technologies Inc.' Version: '4.6.13558 Compatibility Profile Context 26.20.11008.6001' Renderer: 'AMD Radeon(TM) Vega 8 Graphics'

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