Forge 1.8.9 Error - The game crashed whilst initializing game Error: java.lang.VerifyError: Bad type on operand stack

[rhyswilliams17]

So, i get an error when I run Minecraft. My launcher crashes.

 

The game crashed whilst initializing game
The game crashed whilst initializing game
Error: java.lang.VerifyError: Bad type on operand stack

 

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// Daisy, daisy...

Time: 13/05/19 20:57
Description: Initializing game

java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    Config.checkGlError(Ljava/lang/String;)V @102: invokevirtual
  Reason:
    Type 'net/minecraft/network/play/server/S1FPacketSetExperience' (current frame, stack[1]) is not assignable to 'net/minecraft/network/play/server/S43PacketCamera'
  Current Frame:
    bci: @102
    flags: { }
    locals: { 'java/lang/String', integer, 'java/lang/String', 'java/lang/String', 'java/lang/String' }
    stack: { 'net/minecraft/client/renderer/entity/RenderGiantZombie', 'net/minecraft/network/play/server/S1FPacketSetExperience' }
  Bytecode:
    0x0000000: b804 d83c 1b99 0064 1bb8 04dd 4d13 04df
    0x0000010: 06bd 0004 5903 1bb8 04e2 5359 042c 5359
    0x0000020: 052a 53b8 04e6 4e2d b804 e7b8 04ea 9900
    0x0000030: 3b13 04ec 1404 edb8 04f4 9900 2f13 04f6
    0x0000040: 05bd 0004 5903 1bb8 04e2 5359 042c 53b8
    0x0000050: 04fa 3a04 b202 dcb4 04fe b605 04bb 0506
    0x0000060: 5919 04b7 0507 b605 0cb1               
  Stackmap Table:
    append_frame(@105,Integer)

    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)

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: 280107688 bytes (267 MB) / 536870912 bytes (512 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): 
    Launched Version: 1.8.9-forge1.8.9-11.15.1.2318-1.8.9
    LWJGL: 2.9.4
    OpenGL: GeForce GTX 1080/PCIe/SSE2 GL version 4.6.0 NVIDIA 430.64, 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: §c§lJackSucksAtMC §oOfficial 1.8-1.12.2
    Current Language: ~~ERROR~~ NullPointerException: null
    Profiler Position: N/A (disabled)
    CPU: 8x AMD FX(tm)-8350 Eight-Core Processor 

[DaemonUmbra]

1.8.9 is no longer supported on this forum due to its age.

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