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I created a world in version 1.13.1 but then got Forge so I could use mods. Unfortunately I've only found a version 1.12 for Forge, but when I tried to open my world in the Forge profile the game crashed. I've included an image of the crash and the crash report. Any support is welcome. Thank you!

---- Minecraft Crash Report ----
// Why did you do that?

Time: 9/1/18 8:45 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:69)
	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: 412195808 bytes (393 MB) / 1056964608 bytes (1008 MB) up to 1073741824 bytes (1024 MB)
	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP 9.42 Powered by Forge 14.23.4.2705 5 mods loaded, 5 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                                |
	|:------- |:--------- |:------------ |:----------------------------- |:---------------------------------------- |
	| UCHIJAA | minecraft | 1.12.2       | minecraft.jar                 | None                                     |
	| UCHIJAA | mcp       | 9.42         | minecraft.jar                 | None                                     |
	| UCHIJAA | FML       | 8.0.99.99    | forge-1.12.2-14.23.4.2705.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| UCHIJAA | forge     | 14.23.4.2705 | forge-1.12.2-14.23.4.2705.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| UCHIJAA | cfm       | 5.8.0        | cfm-5.8.0-mc1.12.2.jar        | None                                     |

	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'