Exception in Server Tick Loop

Please help me with a bug on my pixelmon server, I can't start on singleplayer and it keeps givint this error. It was working fine yesterday.

Time: 3/16/20 4:10 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
    at net.minecraft.nbt.NBTTagCompound.func_152449_a(NBTTagCompound.java:497)
    at net.minecraft.nbt.NBTTagCompound.func_152446_a(NBTTagCompound.java:58)
    at net.minecraft.nbt.NBTTagList.func_152446_a(NBTTagList.java:63)
    at net.minecraft.nbt.NBTTagCompound.func_152449_a(NBTTagCompound.java:497)
    at net.minecraft.nbt.NBTTagCompound.func_152446_a(NBTTagCompound.java:58)
    at net.minecraft.nbt.NBTTagCompound.func_152449_a(NBTTagCompound.java:497)
    at net.minecraft.nbt.NBTTagCompound.func_152446_a(NBTTagCompound.java:58)
    at net.minecraft.nbt.CompressedStreamTools.func_152455_a(CompressedStreamTools.java:133)
    at net.minecraft.nbt.CompressedStreamTools.func_152456_a(CompressedStreamTools.java:88)
    at net.minecraft.nbt.CompressedStreamTools.func_74794_a(CompressedStreamTools.java:83)
    at net.minecraft.world.chunk.storage.AnvilChunkLoader.loadChunk__Async(AnvilChunkLoader.java:89)
    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.server.management.PlayerChunkMapEntry$1.run(PlayerChunkMapEntry.java:39)
    at net.minecraftforge.common.chunkio.ChunkIOProvider.runCallbacks(ChunkIOProvider.java:134)
    at net.minecraftforge.common.chunkio.ChunkIOProvider.syncCallback(ChunkIOProvider.java:96)
    at net.minecraftforge.common.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:94)
    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.server.management.PlayerChunkMapEntry$1.run(PlayerChunkMapEntry.java:39)
    at net.minecraftforge.common.chunkio.ChunkIOProvider.runCallbacks(ChunkIOProvider.java:134)
    at net.minecraftforge.common.chunkio.ChunkIOProvider.syncCallback(ChunkIOProvider.java:96)
    at net.minecraftforge.common.chunkio.ChunkIOExecutor.tick(ChunkIOExecutor.java:150)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:728)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
    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:
---------------------------------------------------------------------------------------

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Mac OS X (x86_64) version 10.11.6
    Java Version: 1.8.0_74, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1036010032 bytes (988 MB) / 1476395008 bytes (1408 MB) up to 3221225472 bytes (3072 MB)
    JVM Flags: 7 total; -Xmx3G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 20, tallocated: 86
    FML: MCP 9.42 Powered by Forge 14.23.5.2847 11 mods loaded, 11 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-1.12.2-14.23.5.2847.jar       | None                                     |
    | LCHIJA | forge           | 14.23.5.2847             | forge-1.12.2-14.23.5.2847.jar       | None                                     |
    | LCHIJA | cxlibrary       | 1.6.1                    | cxlibrary-1.12.1-1.6.1.jar          | None                                     |
    | LCHIJA | inventorytweaks | 1.63+release.109.220f184 | Cópia de InventoryTweaks-1.63.jar   | 55d2cd4f5f0961410bf7b91ef6c6bf00a766dcbe |
    | LCHIJA | jei             | 4.8.5.159                | jei_1.12.2-4.8.5.159.jar            | None                                     |
    | LCHIJA | journeymap      | 1.12.2-5.5.2             | journeymap-1.12.2-5.5.2.jar         | None                                     |
    | LCHIJA | morefurnaces    | 1.10.5                   | MoreFurnaces-1.12.2-1.10.6.jar      | None                                     |
    | LCHIJA | pixelmon        | 7.2.0                    | Pixelmon-1.12.2-7.2.0-universal.jar | None                                     |
    | LCHIJA | torohealthmod   | 1.12.2-11                | torohealth-1.12.2-11.jar            | None                                     |

    Loaded coremods (and transformers): 
CXLibraryCore (cxlibrary-1.12.1-1.6.1.jar)
  cubex2.cxlibrary.CoreModTransformer
Inventory Tweaks Coremod (Cópia de InventoryTweaks-1.63.jar)
  invtweaks.forge.asm.ContainerTransformer
    GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
    Profiler Position: N/A (disabled)
    Player Count: 1 / 8; [EntityPlayerMP['Silvaaa'/12, l='Pixelmon ft. Ray', x=-529.22, y=65.50, z=326.28]]
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'fml,forge'