> [00:18:57 ERROR] : Encountered an unexpected exception net.minecraft.server.v1_13_R1.ReportedException: Exception generating new chunk at net.minecraft.server.v1_13_R1.MinecraftServer.w(MinecraftServer.java:951) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.DedicatedServer.w(DedicatedServer.java:411) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.MinecraftServer.v(MinecraftServer.java:819) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.MinecraftServer.run(MinecraftServer.java:717) [server.jar:git-Spigot-fe3ab0d-0611294] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171] Caused by: java.util.concurrent.ExecutionException: java.lang.NullPointerException at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:127) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.PlayerChunk.a(PlayerChunk.java:85) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.PlayerChunkMap.flush(PlayerChunkMap.java:143) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldServer.doTick(WorldServer.java:309) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.MinecraftServer.w(MinecraftServer.java:940) ~ [server.jar:git-Spigot-fe3ab0d-0611294] ... 4 more Caused by: java.lang.NullPointerException at net.minecraft.server.v1_13_R1.MobSpawnerAbstract.setMobName(MobSpawnerAbstract.java:43) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDungeons.a(SourceFile:129) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDungeons.generate(SourceFile:23) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDecoratorDungeon.a(SourceFile:20) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDecoratorDungeon.a(SourceFile:12) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenFeatureComposite.a(SourceFile:27) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.BiomeBase.a(SourceFile:514) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkGeneratorAbstract.addDecorations(ChunkGeneratorAbstract.java:98) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at org.bukkit.craftbukkit.v1_13_R1.generator.NormalChunkGenerator.addDecorations(NormalChunkGenerator.java:59) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTaskDecorate.a(SourceFile:12) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTask.a(SourceFile:35) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:95) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTaskScheduler.a(ChunkTaskScheduler.java:62) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTaskScheduler.a(ChunkTaskScheduler.java:1) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:130) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442) ~ [?:1.8.0_171] at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:260) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture$UniCompletion.claim(CompletableFuture.java:529) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:599) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:617) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.thenApplyAsync(CompletableFuture.java:1993) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:130) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:105) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:22) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:105) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:22) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:105) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:22) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:98) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler.a(SourceFile:60) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590) ~ [?:1.8.0_171] at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:260) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture.asyncSupplyStage(CompletableFuture.java:1604) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.supplyAsync(CompletableFuture.java:1830) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler.b(SourceFile:61) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.SchedulerBatch.a(SourceFile:39) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkProviderServer.generateChunk(ChunkProviderServer.java:176) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkProviderServer.generateChunk(ChunkProviderServer.java:166) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:127) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.PlayerChunk.a(PlayerChunk.java:85) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.PlayerChunkMap.flush(PlayerChunkMap.java:143) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldServer.doTick(WorldServer.java:309) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.MinecraftServer.w(MinecraftServer.java:940) ~ [server.jar:git-Spigot-fe3ab0d-0611294] ... 4 more > [00:18:57 ERROR] : Cause of unexpected exception was java.util.concurrent.ExecutionException: java.lang.NullPointerException at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1895) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:127) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.PlayerChunk.a(PlayerChunk.java:85) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.PlayerChunkMap.flush(PlayerChunkMap.java:143) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldServer.doTick(WorldServer.java:309) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.MinecraftServer.w(MinecraftServer.java:940) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.DedicatedServer.w(DedicatedServer.java:411) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.MinecraftServer.v(MinecraftServer.java:819) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.MinecraftServer.run(MinecraftServer.java:717) [server.jar:git-Spigot-fe3ab0d-0611294] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171] Caused by: java.lang.NullPointerException at net.minecraft.server.v1_13_R1.MobSpawnerAbstract.setMobName(MobSpawnerAbstract.java:43) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDungeons.a(SourceFile:129) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDungeons.generate(SourceFile:23) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDecoratorDungeon.a(SourceFile:20) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenDecoratorDungeon.a(SourceFile:12) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.WorldGenFeatureComposite.a(SourceFile:27) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.BiomeBase.a(SourceFile:514) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkGeneratorAbstract.addDecorations(ChunkGeneratorAbstract.java:98) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at org.bukkit.craftbukkit.v1_13_R1.generator.NormalChunkGenerator.addDecorations(NormalChunkGenerator.java:59) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTaskDecorate.a(SourceFile:12) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTask.a(SourceFile:35) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:95) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTaskScheduler.a(ChunkTaskScheduler.java:62) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkTaskScheduler.a(ChunkTaskScheduler.java:1) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:130) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442) ~ [?:1.8.0_171] at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:260) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture$UniCompletion.claim(CompletableFuture.java:529) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:599) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.uniApplyStage(CompletableFuture.java:617) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.thenApplyAsync(CompletableFuture.java:1993) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:130) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:105) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:22) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:105) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:22) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:105) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkStatus.a(SourceFile:22) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:126) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.Map.computeIfAbsent(Map.java:957) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:120) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler$a.a(SourceFile:98) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.Scheduler.a(SourceFile:60) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590) ~ [?:1.8.0_171] at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:260) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at java.util.concurrent.CompletableFuture.asyncSupplyStage(CompletableFuture.java:1604) ~ [?:1.8.0_171] at java.util.concurrent.CompletableFuture.supplyAsync(CompletableFuture.java:1830) ~ [?:1.8.0_171] at net.minecraft.server.v1_13_R1.Scheduler.b(SourceFile:61) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.SchedulerBatch.a(SourceFile:39) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkProviderServer.generateChunk(ChunkProviderServer.java:176) ~ [server.jar:git-Spigot-fe3ab0d-0611294] at net.minecraft.server.v1_13_R1.ChunkProviderServer.generateChunk(ChunkProviderServer.java:166) ~ [server.jar:git-Spigot-fe3ab0d-0611294] ... 9 more