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I have solved the problem, my Forge version of one version off. Thanks everyone

Sorry to post this here as I do not know if this is an appropriate place, but I have put this message everywhere I could think of with no reply. Recently I have started modding on my new computer, and everything was going great. That is until recently, when my game started crashing on launch.I removed all mods one by one until I found out that Optifine was the cause. It was working earlier, so I do not what happened. I have tried 4 different versions of forge and 5 different versions of Optifine on Minecraft 1.12.2.

I consider Optifine a necessity, so this has been pretty frustrating to say the least. Crash Report:

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

// Surprise! Haha. Well, this is awkward.

Time: 3/3/19 1:57 PM
Description: Exception ticking world

java.lang.NoSuchMethodError: net.minecraft.entity.EntityLiving$SpawnPlacementType.canSpawnAt(Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;)Z
at net.minecraft.world.WorldEntitySpawner.func_180267_a(WorldEntitySpawner.java:226)
at net.minecraft.world.WorldEntitySpawner.func_77192_a(WorldEntitySpawner.java:135)
at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:203)
at WorldServerOF.func_72835_b(WorldServerOF.java:37)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:756)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:239)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:745)

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

-- Head --
Thread: Server thread
Stacktrace:
at net.minecraft.world.WorldEntitySpawner.func_180267_a(WorldEntitySpawner.java:226)
at net.minecraft.world.WorldEntitySpawner.func_77192_a(WorldEntitySpawner.java:135)
at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:203)
at WorldServerOF.func_72835_b(WorldServerOF.java:37)

-- Affected level --
Details:
Level name: New World-
All players: 1 total; [EntityPlayerMP['ScabbersStories'/11, l='New World-', x=109.50, y=64.00, z=581.50]]
Chunk stats: ServerChunkCache: 1135 Drop: 0
Level seed: 3133518929786696195
Level generator: ID 01 - flat, ver 0. Features enabled: true
Level generator options: 3;minecraft:bedrock,3minecraft:stone,52minecraft:sandstone,8*minecraft:sand;2;village,biome_1,decoration,stronghold,mineshaft,dungeon
Level spawn location: World: (104,4,583), Chunk: (at 8,0,7 in 6,36; contains blocks 96,0,576 to 111,255,591), Region: (0,1; contains chunks 0,32 to 31,63, blocks 0,0,512 to 511,255,1023)
Level time: 20 game time, 20 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 115242 (now: false), thunder time: 124054 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:756)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:239)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:745)

-- 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: 208121248 bytes (198 MB) / 671088640 bytes (640 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 9.42 Powered by Forge 14.23.5.2796 Optifine OptiFine_1.12.2_HD_U_C5 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-1.12.2-14.23.5.2796.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |

| LCHIJA | forge     | 14.23.5.2796 | forge-1.12.2-14.23.5.2796.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: 1 / 8; [EntityPlayerMP['ScabbersStories'/11, l='New World-', x=109.50, y=64.00, z=581.50]]

Type: Integrated Server (map_client.txt)

Is Modded: Definitely; Client brand changed to 'fml,forge'

OptiFine Version: OptiFine_1.12.2_HD_U_C5

Render Distance Chunks: 12

Mipmaps: 4

Anisotropic Filtering: 1

Antialiasing: 0

Multitexture: false

Shaders: Seus

OpenGlVersion: 4.6.0 NVIDIA 388.13

OpenGlRenderer: GeForce GTX 1050 Ti/PCIe/SSE2

OpenGlVendor: NVIDIA Corporation

CpuCount: 4

Quote from InfiniteCorners»

It helped enough. I couldn't use your specific files but I was able to recreate approximately what you have. I have tested and confirmed with Optifine 1.12.2 HD U E1 that in 1.12.2 biome specific mob switching works BUT you can no longer use numeric IDs to reference the biomes. It sucks but like I said in my first post, I we all had to do it when updating our packs. I'm not sure if you can use numeric IDs for modded biomes (since I don't pay modded) but if you have entity switching working in any of those I would say those are okay. In the example I packaged all of my zombies are using the correct skins except for in the Cold Taiga biome which I referenced using the numeric ID rather than the game name. Just for the sake of being thorough I included a text document that show the correct syntax for each biome name in 1.12.2 since they didn't show that on the wiki. Hope it helps.

http://www.mediafire.com/file/3rfq01jf113390c/Biome_Zombies.zip/file

https://minecraft.gamepedia.com/Biome/IDs_before_1.13

Thanks man, guess it's time to get to work.

Hope this helps. If it does not I will go back to my Mac and make the file there. I have successfully done this before, but I was an idiot and deleted all the files.

Optifine?

I don't think this possible, but I think it would be a really cool idea to make this work with the upcoming "better villagers mod" from the What If series.