Game crashes when loading a server

this is my chrash report pls tell me whats wrong

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 2/23/21 7:48 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:450)
    at net.minecraft.world.chunk.storage.AnvilChunkLoader.checkedReadChunkFromNBT__Async(AnvilChunkLoader.java:129)
    at net.minecraft.world.chunk.storage.AnvilChunkLoader.loadChunk__Async(AnvilChunkLoader.java:93)
    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: Mac OS X (x86_64) version 10.16
    Java Version: 1.8.0_74, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 229677848 bytes (219 MB) / 536870912 bytes (512 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 16, tcache: 0, allocated: 13, tallocated: 95
    FML: MCP 9.42 Powered by Forge 14.23.5.2854 6 mods loaded, 6 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-1.12.2-14.23.5.2854.jar               | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | forge         | 14.23.5.2854 | forge-1.12.2-14.23.5.2854.jar               | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | lunatriuscore | 1.2.0.42     | LunatriusCore-1.12.2-1.2.0.42-universal.jar | None                                     |
    | LCHIJA | schematica    | 1.8.0.165    | Schematica-1.12.2-1.8.0.165-universal.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'