I downloaded a modpack with a load of mods. (I asked the creator how to fix this error and he did not know how) I keep crashing when I try to start the error is:

WARNING: coremods are present:
  FMLLoadingPlugin (ModCore_Container-1.0.jar)
  CTJSLoadingPlugin (ctjs-1.2.2-1.8.9.jar)
  OptifinePatcherTweaker (Patcher-1.2 (1.8.9).jar)
  FMLLoadingPlugin (OofMod-2.0.2 (1.8.9).jar)
  Perspective Mod ([1.8.9] Perspective Mod-3.0.jar)
  PatcherTweaker (Patcher-1.2 (1.8.9).jar)
  FMLLoadingPlugin (Scrollable Tooltips-1.2 (1.8.9).jar)
  FMLLoadingPlugin (AutoGG-3.4 (1.8.9).jar)
  FMLLoadingPlugin (MemoryFix-0.3.jar)
  SkyblockAddonsLoadingPlugin (SkyblockAddons-1.5.2-for-MC-1.8.9.jar)
  Main (OldAnimationsMod v2.4.2 FORGE MC1.8.9.jar)
  FMLLoadingPlugin (MouseDelayFix-1.0.jar)
  PlayerAPIPlugin (PlayerAPI-1.8.9-1.0.jar)
  FMLLoadingPlugin (Skypixel-0.0.6.jar)
Contact their authors BEFORE contacting forge

// Hey, that tickles! Hehehe!

Time: 06/08/20 16:28
Description: Initializing game

java.lang.VerifyError: Expecting a stackmap frame at branch target 17
Exception Details:
  Location:
    net/minecraft/client/gui/GuiNewChat.func_146230_a(I)V @13: if_acmpne
  Reason:
    Expected stackmap frame at this location.
  Bytecode:
    0x0000000: 2ab4 002b b400 36b4 003c b200 3fa6 0004
    0x0000010: b12a b600 433d 033e 0336 042a b400 29b9
    0x0000020: 0048 0100 3605 2ab4 002b b400 36b4 004c
    0x0000030: 124d 6a12 4e62 3806 1505 9d00 04b1 2ab6
    0x0000040: 0052 9900 0504 3e2a b600 5638 072a b600
    0x0000050: 5986 1707 6eb8 005f 3608 b800 640d 1265
    0x0000060: b200 6a99 0006 126b 660b b800 6f17 0717
    0x0000070: 070c b800 7203 3609 1509 2ab4 0074 602a
    0x0000080: b400 29b9 0048 0100 a200 fe15 091c a200
    0x0000090: f82a b400 2915 092a b400 7460 b900 7802
    0x00000a0: 00c0 007a 3a0a 190a c700 06a7 00d5 1b19
    0x00000b0: 0ab6 007d 6436 0b15 0b11 00c8 a100 071d
    0x00000c0: 9900 c015 0b87 1400 7e6f 390c 0f18 0c67
    0x00000d0: 390c 180c 1400 806b 390c 180c 0e0f b800
    0x00000e0: 8539 0c18 0c18 0c6b 390c 1400 8618 0c6b
    0x00000f0: 8e36 0e1d 9900 0811 00ff 360e 150e 8617
    0x0000100: 066a 8b36 0e84 0401 150e 06a4 0075 0336
    0x0000110: 0f15 0974 1009 6836 1015 0f15 10b2 008a
    0x0000120: 9a00 1d10 0964 150f 1508 6007 6015 10b8
    0x0000130: 008f 150e 6805 6c10 1878 b800 9319 0ab6
    0x0000140: 0097 0315 1010 0964 150e b800 9d19 0ab6
    0x0000150: 0097 b900 a301 003a 11b8 00a6 2ab4 002b
    0x0000160: b400 aa19 1115 0f86 1510 1008 6486 12ab
    0x0000170: 150e 1018 7860 b600 b157 b800 b4b8 00b7
    0x0000180: 8409 01a7 fef5 1d99 0092 2ab4 002b b400
    0x0000190: aab4 00ba 3609 12bb 0b0b b800 6f15 0515
    0x00001a0: 0968 1505 6036 0a15 0415 0968 1504 6036
    0x00001b0: 0b2a b400 7415 0b68 1505 6c36 1215 0b15
    0x00001c0: 0b68 150a 6c36 1315 0a15 0b9f 004e 1512
    0x00001d0: 9e00 0911 00aa a700 0510 6036 0e2a b400
    0x00001e0: bd99 0008 12be a700 0512 bf36 0f03 1512
    0x00001f0: 7405 1512 7415 1364 150f 150e 1018 7860
    0x0000200: b800 9305 1512 7404 1512 7415 1364 12c0
    0x0000210: 150e 1018 7860 b800 93b8 00c3 b1       

    at net.minecraft.client.gui.GuiIngame.<init>(GuiIngame.java:102)
    at net.minecraftforge.client.GuiIngameForge.<init>(GuiIngameForge.java:80)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:497)
    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)

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

-- Head --
Stacktrace:
    at net.minecraft.client.gui.GuiIngame.<init>(GuiIngame.java:102)
    at net.minecraftforge.client.GuiIngameForge.<init>(GuiIngameForge.java:80)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:497)

-- Initialization --
Details:
Stacktrace:
    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)

-- 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=DeepEquals,folder=.\config\ChatTriggers\modules\DeepEquals,metadata=ModuleMetadata(name=DeepEquals, version=1.0.0, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Compare two different objects for deep equality, requires=null, ignored=null, isRequired=false)}, Module{name=DeepProxy,folder=.\config\ChatTriggers\modules\DeepProxy,metadata=ModuleMetadata(name=DeepProxy, version=2.0.0, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=Ecolsson, description=null, requires=null, ignored=null, isRequired=false)}, Module{name=DungeonUtilities,folder=.\config\ChatTriggers\modules\DungeonUtilities,metadata=ModuleMetadata(name=DungeonUtilities, version=0.8.0, entry=index.js, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=null, requires=[SettingsManager], ignored=null, isRequired=false)}, Module{name=Elementa,folder=.\config\ChatTriggers\modules\Elementa,metadata=ModuleMetadata(name=Elementa, version=1.4.3, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Gui Library, requires=null, ignored=null, isRequired=false)}, Module{name=GoodGameAuto,folder=.\config\ChatTriggers\modules\GoodGameAuto,metadata=ModuleMetadata(name=null, version=null, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=null, requires=null, ignored=null, isRequired=false)}, Module{name=oof,folder=.\config\ChatTriggers\modules\oof,metadata=ModuleMetadata(name=oof, version=1.0, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Plays an oof on kill, on a lot of games (props to fifti), requires=null, ignored=null, isRequired=false)}, Module{name=PersistentData,folder=.\config\ChatTriggers\modules\PersistentData,metadata=ModuleMetadata(name=PersistentData, version=1.1.3, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Easily store data that persist between game and ct reloads, requires=[DeepProxy], ignored=null, isRequired=false)}, Module{name=PersistentVariables,folder=.\config\ChatTriggers\modules\PersistentVariables,metadata=ModuleMetadata(name=PersistantVariables, version=null, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Easily create variables that persist between ct reloads, requires=[DeepEquals], ignored=null, isRequired=false)}, Module{name=Promise,folder=.\config\ChatTriggers\modules\Promise,metadata=ModuleMetadata(name=Promise, version=1.0.0, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=Promise polyfill for 1.0.0, requires=null, ignored=null, isRequired=false)}, Module{name=request,folder=.\config\ChatTriggers\modules\request,metadata=ModuleMetadata(name=request, version=2.0.0, entry=null, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=Ecolsson, description=A nicer alternative to XMLHttpRequest with a promise-like API. See the README.md for a full api description, requires=[Promise], ignored=null, isRequired=false)}, Module{name=SBInvSee,folder=.\config\ChatTriggers\modules\SBInvSee,metadata=ModuleMetadata(name=SBInvSee, version=1.0.1, entry=index.js, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=See the inventory contents of a hypixel skyblock player, requires=[request, PersistentData], 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)}, Module{name=SkyblockCommands,folder=.\config\ChatTriggers\modules\SkyblockCommands,metadata=ModuleMetadata(name=&5&k&l00&r&3 Sky&2Block &6Commands &r&5&k&l00&r&c&o by &r&4&oDolphin0xyz, version=&3&l&k0&r&6&l&o1&3&l&o.&6&l&o4&3&l&o.&6&l&o2&r&3&l&k0, entry=main.js, asmEntry=null, asmExposedFunctions=null, tags=null, pictureLink=null, creator=null, description=&a&l&k0&r&3 Adds keybinds for most skyblock commands and fast travel warps in the vanilla controls menu. &r&a&l&k0
&r&e&l&k0&r&2 If keys conflicts with other keys things may not work and things outside this moudule may break. &r&e&l&k0
&r&b&l&k0&r&d Contact me if you find bugs, need help, or have features to suggest. My discord name is Dolphin0xyz#7887 and you can also find me on the ChatTriggers discord server. &r&b&l&k0, requires=null, ignored=null, isRequired=false)}]
    Minecraft Version: 1.8.9
    Operating System: Windows 10 (amd64) version 10.0
    CPU: 4x Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHz
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 398297544 bytes (379 MB) / 771751936 bytes (736 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -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 42 mods loaded, 0 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
        mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
        FML{8.0.99.99} [Forge Mod Loader] (forge-1.8.9-11.15.1.2318-1.8.9.jar) 
        Forge{11.15.1.2318} [Minecraft Forge] (forge-1.8.9-11.15.1.2318-1.8.9.jar) 
        perspectivemod{3.0} [Perspective Mod 3.0] (minecraft.jar) 
        mousedelayfix{1.0} [MouseDelayFix] (minecraft.jar) 
        oldanimations{2.4.2} [OldAnimationsMod] (minecraft.jar) 
        PlayerAPI{1.0} [Player API] (minecraft.jar) 
        autotip{3.0.1} [Autotip] (Autotip-3.0.1 [1.8-1.12.2].jar) 
        nick_hider{5.3.1} [Nick Hider] (Nick Hider-5.3.1 (1.8.9).jar) 
        modcore{0.1.39} [ModCore] (Sk1er Modcore-0.1.39 (1.8.9).jar) 
        ingameserverswitcher{1.0} [Ingame Server Switcher] ((1.8.9) IngameServerSwitcher.jar) 
        pownspotionhud{1.0} [pownspotionhud] (1.8.9_Powns_PotionEffect_HUD_-_1.0.jar) 
        blockoverlay{2.1} [BlockOverlay] ([1.8.9] BlockOverlay-v2.1.jar) 
        canelexkeystrokes{1.0} [Canelex Keystrokes] ([1.8.9] canelex keystrokes.jar) 
        customcrosshairmod{0.5.1-Forge} [Custom Crosshair Mod] ([1.8.9] Crosshairmod-v0.5.1.jar) 
        Powns ArmorStatus HUD{1.0} [powns-armorhud] ([1.8.9] Powns ArmorStatus HUD - 1.1.jar) 
        pownscoordshud{1.0} [Powns' Coords HUD] ([1.8.9] Powns Coords HUD - 1.0.jar) 
        pownstogglesneak{3.0} [pownstogglesneak] ([1.8.9] Powns ToggleSneak - 3.0.jar) 
        ToggleSneak{3.1.4} [ToggleSneak] ([1.8.9] Powns ToggleSneak Edit V1.1.jar) 
        sidebarmod{2.0} [Sidebar Mod Revamp] ([1.8.9] Sidebar Mod Revamp.jar) 
        alwayssharp{1.0} [AlwaysSharp] (alwayssharp-1.0.jar) 
        autogg{2.0.4} [Auto GG] (AutoGG-2.0.4 (1.8.9).jar) 
        autogg{3.4} [AutoGG] (AutoGG-3.4 (1.8.9).jar) 
        autotip{2.0.3} [Autotip] (Autotip-2.0.3 [1.8-1.11.2].jar) 
        AutoWho{1.0} [AutoWho] (AutoWho-1.0.jar) 
        ct.js{1.2.2} [ChatTriggers] (ctjs-1.2.2-1.8.9.jar) 
        DiscordRP{1.2.4} [DiscordRP] (DiscordRP-1.2.4.jar) 
        memoryfix{0.3} [MemoryFix] (MemoryFix-0.3.jar) 
        modcore_example_mod{1.0} [ModCore Container Mod] (ModCore_Container-1.0.jar) 
        refractionoof{2.0.2} [OofMod] (OofMod-2.0.2 (1.8.9).jar) 
        patcher{1.2} [Patcher] (Patcher-1.2 (1.8.9).jar) 
        quickplay{2.0.3} [Quickplay] (Quickplay-1.8.9-2.0.3.jar) 
        resourcepackmanager{1.0} [Resource Pack Manager] (Resource_Pack_Manager_1.1.jar) 
        ResourcePackOrganizer{1.0.3} [Resource Pack Organizer] (ResourcePackOrganizer  MC-1.8.9  v1.0.3.jar) 
        text_overflow_scroll{1.2} [Scrollable Tooltips] (Scrollable Tooltips-1.2 (1.8.9).jar) 
        hypixel_auto_complete{1.0} [Hypixel Autocomplete Mod] (Sk1er Hypixel Autocomplete Mod-1.0.jar) 
        skyblockaddons{1.5.2} [SkyBlock Addons] (SkyblockAddons-1.5.2-for-MC-1.8.9.jar) 
        skypixel{0.0.6} [Skypixel] (Skypixel-0.0.6.jar) 
        skywarsmod{1.0} [SkyWars Stats Mod] (SkyWars Stats Mod-v1.0.3.jar) 
        timechanger{1.0} [TimeChanger] (TimeChanger-1.0 (1.8.9).jar) 
        publictogglechat{2.1.0} [Hypixel - ToggleChat] (ToggleChat-2.1.0-SNAPSHOT.jar) 
        enhancements{7.7} [Vanilla Enhancements] (Vanilla Enhancements-7.7.jar) 
    Loaded coremods (and transformers): 
FMLLoadingPlugin (ModCore_Container-1.0.jar)
  
CTJSLoadingPlugin (ctjs-1.2.2-1.8.9.jar)
  com.chattriggers.ctjs.launch.plugin.CTJSTransformer
OptifinePatcherTweaker (Patcher-1.2 (1.8.9).jar)
  club.sk1er.patcher.tweaker.optifine.OptifineClassTransformer
FMLLoadingPlugin (OofMod-2.0.2 (1.8.9).jar)
  
Perspective Mod ([1.8.9] Perspective Mod-3.0.jar)
  net.canelex.perspectivemod.asm.CameraTransformer
PatcherTweaker (Patcher-1.2 (1.8.9).jar)
  club.sk1er.mods.core.forge.ClassTransformer
  club.sk1er.patcher.tweaker.ClassTransformer
FMLLoadingPlugin (Scrollable Tooltips-1.2 (1.8.9).jar)
  club.sk1er.mods.overflowscroll.forge.ClassTransformer
FMLLoadingPlugin (AutoGG-3.4 (1.8.9).jar)
  club.sk1er.mods.core.forge.ClassTransformer
FMLLoadingPlugin (MemoryFix-0.3.jar)
  io.prplz.memoryfix.ClassTransformer
SkyblockAddonsLoadingPlugin (SkyblockAddons-1.5.2-for-MC-1.8.9.jar)
  codes.biscuit.skyblockaddons.tweaker.SkyblockAddonsTransformer
Main (OldAnimationsMod v2.4.2 FORGE MC1.8.9.jar)
  com.spiderfrog.main.ClassTransformer
FMLLoadingPlugin (MouseDelayFix-1.0.jar)
  io.prplz.mousedelayfix.ClassTransformer
PlayerAPIPlugin (PlayerAPI-1.8.9-1.0.jar)
  api.player.forge.PlayerAPITransformer
FMLLoadingPlugin (Skypixel-0.0.6.jar)
  io.prplz.skypixel.asm.ClassTransformer
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.5.0 NVIDIA 382.05' Renderer: 'GeForce 940MX/PCIe/SSE2'
    Launched Version: 1.8.9-forge1.8.9-11.15.1.2318-1.8.9
    LWJGL: 2.9.4
    OpenGL: GeForce 940MX/PCIe/SSE2 GL version 4.5.0 NVIDIA 382.05, NVIDIA Corporation
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: ! §9Pastelic §8[§9Blue§8].zip
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 4x Intel(R) Core(TM) i5-6300HQ CPU @ 2.30GHz

1.8 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.