ATM 3 Server crashed (1.12.2)

Hey guys, I was playing the All The Mods 3 Modpack and I have built a little  Immersive Engineerig Factory, then i left. Today at morning I couldn't join  and the server  is now in a crash loop.

Here is the crash log.

Exception in server tick loop

at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)

at java.util.HashMap$ValueIterator.next(HashMap.java:1498)

at net.minecraft.world.World.func_147448_a(World.java:1949)

at net.minecraft.world.chunk.Chunk.func_76631_c(Chunk.java:856)

at net.minecraftforge.common.chunkio.ChunkIOProvider.syncCallback(ChunkIOProvider.java:109)

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.world.gen.ChunkProviderServer.func_186025_d(ChunkProviderServer.java:135)

at net.minecraft.world.World.func_72964_e(World.java:310)

at net.minecraft.world.World.func_175726_f(World.java:305)

at net.minecraft.world.World.func_175625_s(World.java:2402)

at mekanism.common.chunkloading.ChunkManager.ticketsLoaded(ChunkManager.java:21)

at net.minecraftforge.common.ForgeChunkManager.loadWorld(ForgeChunkManager.java:611)

at net.minecraftforge.common.ForgeInternalHandler.onDimensionLoad(ForgeInternalHandler.java:70)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_1128_ForgeInternalHandler_onDimensionLoad_Load.invoke(.dynamic)

at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)

at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)

at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:309)

at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:270)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)

at java.lang.Thread.run(Thread.java:748)