Forge Installation Error ( java.lang.NoClassDefFoundError: )

[HunterKitHaterOctl]

Hey! I keep getting this error when trying to run a forge version of 1.8.9. Please let me know if you know how to fix this or any additional steps I can take. <3

Mods I'm using:
Sk1ers autocorrect 1.2
AutoGG 4.0.3
Autotip 3.0.1
Optifine 1.8.9 U L5
worldedit 1.8.9

Spoiler: Crash Report

---- Minecraft Crash Report ----

WARNING: coremods are present:
AutoCorrectTweaker (Autocorrect-1.2 (1.8.9).jar)
FMLLoadingPlugin (AutoGG-4.0.3 (1.8.9).jar)
Contact their authors BEFORE contacting forge

// This doesn't make any sense!

Time: 12/19/20 1:05 PM
Description: Initializing game

java.lang.NoClassDefFoundError: net/optifine/gui/GuiMessage
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
at java.lang.Class.getField0(Class.java:2975)
at java.lang.Class.getField(Class.java:1701)
at net.minecraftforge.fml.client.FMLClientHandler.detectOptifine(FMLClientHandler.java:277)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:191)
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.ClassNotFoundException: net.optifine.gui.GuiMessage
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)
... 15 more
Caused by: java.lang.NoClassDefFoundError: net/optifine/gui/GuiScreenOF
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
... 17 more
Caused by: java.lang.ClassNotFoundException: net.optifine.gui.GuiScreenOF
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 21 more


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

-- Head --
Stacktrace:
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
at java.lang.Class.getField0(Class.java:2975)
at java.lang.Class.getField(Class.java:1701)
at net.minecraftforge.fml.client.FMLClientHandler.detectOptifine(FMLClientHandler.java:277)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:191)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:417)

-- 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:
Minecraft Version: 1.8.9
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 122515144 bytes (116 MB) / 268435456 bytes (256 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:
Loaded coremods (and transformers):
AutoCorrectTweaker (Autocorrect-1.2 (1.8.9).jar)
club.sk1er.mods.core.forge.ClassTransformer
club.sk1er.autocorrect.tweaker.ClassTransformer
FMLLoadingPlugin (AutoGG-4.0.3 (1.8.9).jar)
club.sk1er.mods.core.forge.ClassTransformer
Launched Version: 1.8.9-forge1.8.9-11.15.1.2318-1.8.9
LWJGL: 2.9.4
OpenGL: GeForce GTX 1060 6GB/PCIe/SSE2 GL version 4.6.0 NVIDIA 460.79, 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: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: !!§f§lOctls §9§lMashup §f§lPack §9§lv4.zip
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
CPU: 16x AMD Ryzen 7 3700X 8-Core Processor

 

[Zolt]

Try updating, or downgrading your Optifine version.

 

[MoreLikes]

Try updating to the last version of forge and all of your mods

 

[HunterKitHaterOctl]

Try updating, or downgrading your Optifine version.

Do you know which version I should downgrade to? I can try all of them but I'm wondering.

 

[HunterKitHaterOctl]

Try updating to the last version of forge and all of your mods

They should all be the latest. I redownloaded every mod, forge, and Minecraft launcher.

 

[MoreLikes]

They should all be the latest. I redownloaded every mod, forge, and Minecraft launcher.

Sorry, but I don't know what happens. You can always search it on google/youtube tho.

Good Luck