Minecraft Forums

I finally got this to work.

Software needed: Mineways and MCEdit Unified

Here is a link to a short video showing how.

---- Minecraft Crash Report ----

WARNING: coremods are present:
ForgelinPlugin (Forgelin-1.8.0.jar)
BetterFoliageLoader (BetterFoliage-MC1.12-2.2.0.jar)
Contact their authors BEFORE contacting forge

// Don't be sad, have a hug! <3

Time: 11/21/18 11:39 PM
Description: Initializing game

java.lang.VerifyError: Bad type on operand stack
Exception Details:
Location:
Config.checkGlError(Ljava/lang/String;)V @109: invokevirtual
Reason:
Type 'net/minecraft/network/play/server/SPacketCloseWindow' (current frame, stack[1]) is not assignable to 'net/minecraft/network/play/server/SPacketBlockChange'
Current Frame:
bci: @109
flags: { }
locals: { 'java/lang/String', integer, 'java/lang/String', 'java/lang/String', 'java/lang/String' }
stack: { 'cgv', 'net/minecraft/network/play/server/SPacketCloseWindow' }
Bytecode:
0x0000000: b804 6c3c 1b99 006b 1bb8 0472 9900 641b
0x0000010: b804 754d 1304 7706 bd00 0459 031b b804
0x0000020: 7a53 5904 2c53 5905 2a53 b804 7e4e 2db8
0x0000030: 047f b804 8299 003b 1304 8414 0485 b804
0x0000040: 8c99 002f 1304 8e05 bd00 0459 031b b804
0x0000050: 7a53 5904 2c53 b804 923a 04b2 02cd b404
0x0000060: 96b6 049b bb04 9d59 1904 b704 9eb6 04a3
0x0000070: b1
Stackmap Table:
append_frame(@112,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:293)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:216)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
at net.minecraft.client.main.Main.main(SourceFile:123)
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 --
Thread: Client thread
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:293)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:216)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)

-- Initialization --
Details:
Stacktrace:
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
at net.minecraft.client.main.Main.main(SourceFile:123)
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: 1.12.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 295698544 bytes (282 MB) / 469762048 bytes (448 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):
ForgelinPlugin (Forgelin-1.8.0.jar)

BetterFoliageLoader (BetterFoliage-MC1.12-2.2.0.jar)
mods.betterfoliage.loader.BetterFoliageTransformer
Launched Version: 1.12.2-forge1.12.2-14.23.5.2768
LWJGL: 2.9.4
OpenGL: GeForce GTX 970/PCIe/SSE2 GL version 4.6.0 NVIDIA 416.34, 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:
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz