Hi, our server is severed by crashes since updating to Forge 39.0.18 (now too on 39.0.19).

On the description says "Exception ticking world". It worked perfectly until Forge 39.0.10, so I thought the problem might be Forge. Even in single player it's very laggy.

Updating mods didn't help, taking older versions of them neither. Unfortunately I can't roll back forge version, since our served is hosted on website that doesn't allow to choose the desired version.

I was wondering if you could help me with it or simply help me understanding what's happening.

On the console part this usually happens ("Skypping entity" is spammed into the console):

[13Jan2022 15:51:28.658] [Server thread/WARN] [net.minecraft.world.entity.EntityType/]: Skipping Entity with id
[13Jan2022 15:51:28.658] [Server thread/WARN] [net.minecraft.world.entity.EntityType/]: Skipping Entity with id
[13Jan2022 15:51:28.658] [Server thread/WARN] [net.minecraft.world.entity.EntityType/]: Skipping Entity with id
[13Jan2022 15:51:30.967] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer/]: [[Brigadier] JulJul: Teleported [Brigadier] JulJul to 330.500000, 77.500000, 330.500000]
[13Jan2022 15:51:30.968] [Server thread/WARN] [net.minecraft.server.MinecraftServer/]: Can't keep up! Is the server overloaded? Running 2298ms or 45 ticks behind
[13Jan2022 15:51:31.006] [Server thread/WARN] [net.minecraft.world.entity.EntityType/]: Skipping Entity with id
[13Jan2022 15:51:31.006] [Server thread/WARN] [net.minecraft.world.entity.EntityType/]: Skipping Entity with id
[13Jan2022 15:51:31.007] [Server thread/WARN] [net.minecraft.world.entity.EntityType/]: Skipping Entity with id
[13Jan2022 15:52:48.218] [Server thread/ERROR] [net.minecraft.server.MinecraftServer/]: Encountered an unexpected exception
net.minecraft.ReportedException: Exception ticking world
at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:872) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.server.dedicated.DedicatedServer.m_5703_(DedicatedServer.java:328) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.server.MinecraftServer.m_5705_(MinecraftServer.java:808) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:668) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.server.MinecraftServer.m_177918_(MinecraftServer.java:258) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at java.lang.Thread.run(Thread.java:833) [?:?]
Caused by: java.lang.NoSuchFieldError: DIRT
at de.teamlapen.vampirism.world.gen.structures.huntercamp.HunterCampPieces$Tent.m_183269_(HunterCampPieces.java:284) ~[Vampirism-1.18.1-1.8.0-alpha+20220106-2313.jar%2365!:1.8.0-alpha+20220106-2313]
at net.minecraft.world.level.levelgen.structure.StructureStart.m_7129_(StructureStart.java:54) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.world.level.chunk.ChunkGenerator.m_196720_(ChunkGenerator.java:279) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:422) ~[guava-31.0.1-jre.jar%2321!:?]
at net.minecraft.world.level.chunk.ChunkGenerator.m_183372_(ChunkGenerator.java:278) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.world.level.chunk.ChunkStatus.m_187807_(ChunkStatus.java:135) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.world.level.chunk.ChunkStatus.m_187788_(ChunkStatus.java:262) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.server.level.ChunkMap.lambda$scheduleChunkGeneration$20(ChunkMap.java:552) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar%2329!:?]
at net.minecraft.server.level.ChunkMap.lambda$scheduleChunkGeneration$22(ChunkMap.java:550) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[?:?]
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
at net.minecraft.server.level.ChunkTaskPriorityQueueSorter.m_143188_(ChunkTaskPriorityQueueSorter.java:58) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.util.thread.ProcessorMailbox.m_18759_(ProcessorMailbox.java:91) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.util.thread.ProcessorMailbox.m_18747_(ProcessorMailbox.java:146) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at net.minecraft.util.thread.ProcessorMailbox.run(ProcessorMailbox.java:102) ~[server-1.18.1-20211210.034407-srg.jar%2368!:?]
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1395) ~[?:?]
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?]
at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?]
at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?]
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?]
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?]

Here is the Server Crash Report, tell me if you need anything else.
Crash Report 13-01

Ok, I'll wait for their update, so. Thank you.