I can't seem to get Forge working with Optifine for version 1.12.2

I'm using OptiFine 1.12.2_HD_U_E3 which the changelog states is compatible with Forge #2795. Game keeps crashing when trying to load world. I have no other mods/shaders/resource packs installed. 

Ultimately I want to be able to use WorldEdit and SEUS shaders on top of Forge, but can't even get past this first step...

Talk to the Optifin people. We do not make it, and are not responsible for it.

I'm open to any suggestions from people who have both these running. Perhaps there's another version I can try. Optifine don't have forums for me to ask questions like this. Please, helpful replies only. 

Hmmm...okay so it doesn't seem to be an issue with Optifine. Game still crashing even with Optifine removed from mods folder. 

Other versions still working. I've updated the RAM allocation in case that was an issue. I have no clue. 

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 8/16/19 2:14 PM
Description: Exception in server tick loop

java.lang.IllegalArgumentException: ChunkNibbleArrays should be 2048 bytes not: 0
    at net.minecraft.world.chunk.NibbleArray.<init>(SourceFile:16)
    at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75823_a(AnvilChunkLoader.java:449)
    at net.minecraft.world.chunk.storage.AnvilChunkLoader.checkedReadChunkFromNBT__Async(AnvilChunkLoader.java:128)
    at net.minecraft.world.chunk.storage.AnvilChunkLoader.loadChunk__Async(AnvilChunkLoader.java:92)
    at net.minecraftforge.common.chunkio.ChunkIOProvider.run(ChunkIOProvider.java:70)
    at net.minecraftforge.common.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:92)
    at net.minecraft.world.gen.ChunkProviderServer.loadChunk(ChunkProviderServer.java:118)
    at net.minecraft.world.gen.ChunkProviderServer.func_186028_c(ChunkProviderServer.java:89)
    at net.minecraft.world.gen.ChunkProviderServer.func_186025_d(ChunkProviderServer.java:135)
    at net.minecraft.server.MinecraftServer.func_71222_d(MinecraftServer.java:344)
    at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:142)
    at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:156)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
    at java.lang.Thread.run(Thread.java:745)

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

-- System Details --
Details:
    Minecraft Version: 1.12.2
    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: 295464104 bytes (281 MB) / 536870912 bytes (512 MB) up to 4294967296 bytes (4096 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -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 9.42 Powered by Forge 14.23.5.2795 4 mods loaded, 4 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State  | ID        | Version      | Source                        | Signature                                |
    |:------ |:--------- |:------------ |:----------------------------- |:---------------------------------------- |
    | LCHIJA | minecraft | 1.12.2       | minecraft.jar                 | None                                     |
    | LCHIJA | mcp       | 9.42         | minecraft.jar                 | None                                     |
    | LCHIJA | FML       | 8.0.99.99    | forge-1.12.2-14.23.5.2795.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | forge     | 14.23.5.2795 | forge-1.12.2-14.23.5.2795.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |

    Loaded coremods (and transformers): 
    GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
    Profiler Position: N/A (disabled)
    Player Count: 0 / 8; []
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'fml,forge'