i installed creative core for player revive mod and this is the log.

---- Minecraft Crash Report ----

WARNING: coremods are present:
CreativePatchingLoader (CreativeCore v1.8.9 mc1.12.jar)
Contact their authors BEFORE contacting forge

// I just don't know what went wrong :(

Time: 6/28/19 9:58 AM
Description: Exception in server tick loop

java.lang.IllegalArgumentException: ChunkNibbleArrays should be 2048 bytes not: 0
at net.minecraft.world.chunk.NibbleArray.(SourceFile:16)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75823_a(AnvilChunkLoader.java:447)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.checkedReadChunkFromNBT__Async(AnvilChunkLoader.java:139)
at net.minecraft.world.chunk.storage.AnvilChunkLoader.loadChunk__Async(AnvilChunkLoader.java:104)
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:343)
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:313)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:267)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:483)
at java.lang.Thread.run(Thread.java:748)

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

-- System Details --
Details:
Minecraft Version: 1.12
Operating System: Linux (amd64) version 4.4.0-148-generic
Java Version: 1.8.0_202, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 846235416 bytes (807 MB) / 984088576 bytes (938 MB) up to 1304952832 bytes (1244 MB)
JVM Flags: 3 total; -XX:MaxMetaspaceSize=200M -Xmx1400M -Xms700M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.40 Powered by Forge 14.21.1.2387 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
UCHIJAA minecraft{1.12} [Minecraft] (minecraft.jar)
UCHIJAA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAA FML{8.0.99.99} [Forge Mod Loader] (forge.jar)
UCHIJAA forge{14.21.1.2387} [Minecraft Forge] (forge.jar)
UCHIJAA creativecoredummy{1.0.0} [CreativeCoreDummy] (minecraft.jar)
UCHIJAA codechickenlib{3.1.3.313} [CodeChicken Lib] (CodeChickenLib-1.12-3.1.3.313-universal.jar)
UCHIJAA creativecore{1.7.4} [CreativeCore] (CreativeCore v1.8.9 mc1.12.jar)
UCHIJAA jei{4.7.5.86} [Just Enough Items] (jei_1.12-4.7.5.86.jar)
UCHIJAA playerrevive{1.0} [Player Revive] (PlayerRevive v1.2.3 mc1.12.jar)
UCHIJAA veinminer{0.38.2} [Vein Miner] (VeinMiner-1.12-0.38.2.647+b31535a.jar)
UCHIJAA veinminermodsupport{0.38.2} [Mod Support] (VeinMiner-1.12-0.38.2.647+b31535a.jar)
Loaded coremods (and transformers):
CreativePatchingLoader (CreativeCore v1.8.9 mc1.12.jar)

Profiler Position: N/A (disabled)
Player Count: 0 / 20; []
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)

You should update to 1.12.2 and update all of my mods.

ok. thanks.