State engine was incorrect

[Ice_Melody]

So recently i installed the arcania modpack and wheneveri kill 3-5 mobs or new mobs 1-2 the modpack crashes and gives these lines of code. Does anyone know how to fix this? 

 

[B#407]      UCHIJAAAA    IguanaTweaksTConstruct{1.7.10-2.1.6.163} [Iguana Tinker Tweaks] (IguanaTinkerTweaks-1.7.10-2.1.6.jar) 
[B#407]      Mantle Environment: Environment healthy.
[B#407]      TConstruct Environment: Environment healthy.
[B#407]      Chisel: Errors like "[FML]: Unable to lookup ..." are NOT the cause of this crash. You can safely ignore these errors. And update forge while you're at it.
[B#407]      Profiler Position: N/A (disabled)
[B#407]      Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
[B#407]      Player Count: 1 / 8; [EntityPlayerMP['Ice_Melody'/271, l='New World', x=-164,14, y=75,00, z=472,16]]
[B#407]      Type: Integrated Server (map_client.txt)
[B#407]      Is Modded: Definitely; Client brand changed to 'fml,forge'
[B#407]  [00:50:34] [Client thread/INFO] [STDOUT]: [net.minecraft.client.Minecraft:func_71377_b:354]: #@!@# Game crashed! Crash report saved to: #@!@# C:\Users\benja\AppData\Roaming\.technic\modpacks\arcania-craft\crash-reports\crash-2019-06-25_00.50.34-server.txt
[B#407]  [00:50:34] [Client thread/INFO] [FML]: Waiting for the server to terminate/save.
[B#407]  [00:50:34] [Server thread/INFO]: Saving worlds
[B#407]  [00:50:34] [Server thread/INFO]: Saving chunks for level 'New World'/Overworld
[B#407]  [00:50:34] [Netty Client IO #0/INFO] [THAUMCRAFT]: Restoring client configs.
[B#407]  [00:50:34] [Netty Client IO #0/INFO] [MineMenu]: CLIENT: Disconnected from server, enabling all click actions
[B#407]  [00:50:34] [Server thread/ERROR] [FML]: An Entity type com.chocolate.chocolateQuest.entity.mob.EntityHumanSkeleton has thrown an exception trying to write state. It will not persist. Report this to the mod author
[B#407]  java.lang.NullPointerException
[B#407]      at com.chocolate.chocolateQuest.entity.EntityHumanBase.writePartyToNBT(EntityHumanBase.java:422) ~[EntityHumanBase.class:?]
[B#407]      at com.chocolate.chocolateQuest.entity.EntityHumanBase.func_70039_c(EntityHumanBase.java:405) ~[EntityHumanBase.class:?]
[B#407]      at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:346) [aqk.class:?]
[B#407]      at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:197) [aqk.class:?]
[B#407]      at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:256) [ms.class:?]
[B#407]      at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:302) [ms.class:?]
[B#407]      at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:809) [mt.class:?]
[B#407]      at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:318) [MinecraftServer.class:?]
[B#407]      at net.minecraft.server.MinecraftServer.func_71260_j(MinecraftServer.java:350) [MinecraftServer.class:?]
[B#407]      at net.minecraft.server.integrated.IntegratedServer.func_71260_j(IntegratedServer.java:241) [bsx.class:?]
[B#407]      at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:480) [MinecraftServer.class:?]
[B#407]      at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [?:?]
[B#407]  [00:50:34] [Server thread/ERROR] [FML]: An Entity type com.chocolate.chocolateQuest.entity.mob.EntityHumanSkeleton has thrown an exception trying to write state. It will not persist. Report this to the mod author
[B#407]  java.lang.NullPointerException
[B#407]      at com.chocolate.chocolateQuest.entity.EntityHumanBase.writePartyToNBT(EntityHumanBase.java:422) ~[EntityHumanBase.class:?]
[B#407]      at com.chocolate.chocolateQuest.entity.EntityHumanBase.func_70039_c(EntityHumanBase.java:405) ~[EntityHumanBase.class:?]
[B#407]      at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75820_a(AnvilChunkLoader.java:346) [aqk.class:?]
[B#407]      at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75816_a(AnvilChunkLoader.java:197) [aqk.class:?]
[B#407]      at net.minecraft.world.gen.ChunkProviderServer.func_73242_b(ChunkProviderServer.java:256) [ms.class:?]
[B#407]      at net.minecraft.world.gen.ChunkProviderServer.func_73151_a(ChunkProviderServer.java:302) [ms.class:?]
[B#407]      at net.minecraft.world.WorldServer.func_73044_a(WorldServer.java:809) [mt.class:?]
[B#407]      at net.minecraft.server.MinecraftServer.func_71267_a(MinecraftServer.java:318) [MinecraftServer.class:?]
[B#407]      at net.minecraft.server.MinecraftServer.func_71260_j(MinecraftServer.java:350) [MinecraftServer.class:?]
[B#407]      at net.minecraft.server.integrated.IntegratedServer.func_71260_j(IntegratedServer.java:241) [bsx.class:?]
[B#407]      at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:480) [MinecraftServer.class:?]
[B#407]      at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [?:?]
[B#407]  [00:50:34] [Server thread/INFO]: Saving chunks for level 'New World'/Nether
[B#407]  [00:50:34] [Server thread/INFO]: Saving chunks for level 'New World'/The End
[B#407]  [00:50:34] [Server thread/INFO]: Saving chunks for level 'New World'/Alfheim
[B#407]  [00:50:34] [Server thread/INFO]: Saving chunks for level 'New World'/Spirit World
[B#407]  [00:50:34] [Server thread/INFO]: Saving chunks for level 'New World'/Torment
[B#407]  [00:50:34] [Server thread/INFO]: Saving chunks for level 'New World'/Mirror
[B#407]  [00:50:35] [Server thread/INFO]: Saving chunks for level 'New World'/The Outer Lands
[B#407]  [00:50:35] [Server thread/INFO]: Saving chunks for level 'New World'/Bedrock
[B#407]  [00:50:35] [Server thread/INFO]: Saving chunks for level 'New World'/Twilight Forest
[B#407]  [00:50:35] [Server thread/INFO]: Saving chunks for level 'New World'/Pocket Plane
[B#407]  [00:50:35] [Server thread/INFO] [journeymap]: Mapping halted in C:\Users\benja\AppData\Roaming\.technic\modpacks\arcania-craft\journeymap\data\sp\New World\DIM0
[B#407]  [00:50:36] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:36] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:37] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:37] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:37] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:38] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:38] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:38] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:39] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:39] [Server thread/INFO] [STDOUT]: [atomicstryker.minions.common.MinionsCore:getMinionMap:352]: Minions: minionMapLock was hanging
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension 0
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension -1
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension 1
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension -105
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension -37
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension -38
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension -39
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension -42
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension -19
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension 7
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Unloading dimension 69
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Applying holder lookups
[B#407]  [00:50:39] [Server thread/INFO] [FML]: Holder lookups applied
[B#407]  [00:50:39] [Server thread/INFO] [FML]: The state engine was in incorrect state SERVER_STOPPING and forced into state SERVER_STOPPED. Errors may have been discarded.
[B#407]  [00:50:39] [Client thread/INFO] [FML]: Server terminated.
[B#407] Starting download of http://cdn.technicpack.net/platform2/pack-icons/654713.png?1485365125, with 3 tries remaining

[JaariAtmc]

[B#407]      UCHIJAAAA    IguanaTweaksTConstruct{1.7.10-2.1.6.163} [Iguana Tinker Tweaks] (IguanaTinkerTweaks-1.7.10-2.1.6.jar) 
[B#407]      Mantle Environment: Environment healthy.
[B#407]      TConstruct Environment: Environment healthy.
[B#407]      Chisel: Errors like "[FML]: Unable to lookup ..." are NOT the cause of this crash. You can safely ignore these errors. And update forge while you're at it.
[B#407]      Profiler Position: N/A (disabled)
[B#407]      Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
[B#407]      Player Count: 1 / 8; [EntityPlayerMP['Ice_Melody'/271, l='New World', x=-164,14, y=75,00, z=472,16]]
[B#407]      Type: Integrated Server (map_client.txt)
[B#407]      Is Modded: Definitely; Client brand changed to 'fml,forge'

You actually cut off the crash report...

[Munaus]

custom pack discussion.

Moved to Platform Pagoda