这几天玩的好好的，今天突然进不去世界了
Description: Exception generating new chunk

java.util.ConcurrentModificationException: null
        at java.util.HashMap.computeIfAbsent(HashMap.java:1135) ~[?:?] {}
        at net.minecraft.world.gen.feature.template.TemplateManager.func_200219_b(SourceFile:64) ~[?:?] {re:mixin,re:classloading}
        at net.minecraft.world.gen.feature.template.TemplateManager.func_200220_a(SourceFile:54) ~[?:?] {re:mixin,re:classloading}
        at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading}
        at net.minecraft.world.gen.feature.jigsaw.SingleJigsawPiece.func_236843_a_(SingleJigsawPiece.java:71) ~[?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.world.gen.feature.jigsaw.SingleJigsawPiece.func_214852_a(SingleJigsawPiece.java:99) ~[?:?] {re:classloading,pl:accesstransformer:B}
        at net.minecraft.world.gen.feature.jigsaw.JigsawManager.func_242837_a(SourceFile:267) ~[?:?] {re:classloading}
        at com.github.x3rmination.common.structures.PiglinCampStructure$Start.generatePieces(PiglinCampStructure.java:40) ~[x3dungeons:1.8.3] {re:classloading}
        at com.github.x3rmination.common.structures.PiglinCampStructure$Start.func_230364_a_(PiglinCampStructure.java:28) ~[x3dungeons:1.8.3] {re:classloading}
        at net.minecraft.world.gen.feature.structure.Structure.func_242785_a(Structure.java:224) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:the_bumblezone.mixins.json:world.StructureAccessor,pl:mixin:APP:byg.mixins.json:access.StructureAccess,pl:mixin:A}
        at net.minecraft.world.gen.feature.StructureFeature.func_242771_a(SourceFile:35) ~[?:?] {re:classloading}
        at net.minecraft.world.gen.ChunkGenerator.func_242705_a(SourceFile:278) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:betternether.mixins.json:ChunkGeneratorMixin,pl:mixin:APP:yungsapi.mixins.json:ChunkGeneratorAccessor,pl:mixin:APP:cavebiomeapi.mixins.json:ChunkGeneratorMixin,pl:mixin:A}
        at net.minecraft.world.gen.ChunkGenerator.func_242707_a(SourceFile:267) ~[?:?] {re:mixin,re:classloading,pl:mixin:APP:betternether.mixins.json:ChunkGeneratorMixin,pl:mixin:APP:yungsapi.mixins.json:ChunkGeneratorAccessor,pl:mixin:APP:cavebiomeapi.mixins.json:ChunkGeneratorMixin,pl:mixin:A}
        at net.minecraft.world.chunk.ChunkStatus.func_222586_d(ChunkStatus.java:41) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:bettercaves.mixins.json:ChunkStatusMixin,pl:mixin:APP:radon.mixins.json:chunk.MixinChunkStatus,pl:mixin:APP:byg.mixins.json:common.world.ChunkStatusMixin,pl:mixin:A}
        at net.minecraft.world.chunk.ChunkStatus.func_223198_a(ChunkStatus.java:198) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:bettercaves.mixins.json:ChunkStatusMixin,pl:mixin:APP:radon.mixins.json:chunk.MixinChunkStatus,pl:mixin:APP:byg.mixins.json:common.world.ChunkStatusMixin,pl:mixin:A}
        at net.minecraft.world.server.ChunkManager.lambda$null$18(ChunkManager.java:524) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
        at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] {re:classloading,re:classloading,re:classloading,re:classloading}
        at net.minecraft.world.server.ChunkManager.lambda$scheduleChunkGeneration$20(ChunkManager.java:522) ~[?:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:A}
        at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072) ~[?:?] {}
        at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?] {}
        at net.minecraft.world.chunk.ChunkTaskPriorityQueueSorter.func_219083_b(SourceFile:58) ~[?:?] {re:classloading}
        at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213148_e(SourceFile:94) ~[?:?] {re:classloading}
        at net.minecraft.util.concurrent.DelegatedTaskExecutor.func_213145_a(SourceFile:137) ~[?:?] {re:classloading}
        at net.minecraft.util.concurrent.DelegatedTaskExecutor.run(SourceFile:105) ~[?:?] {re:classloading}
        at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426) ~[?:?] {}
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[?:?] {re:computing_frames}
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[?:?] {re:computing_frames}
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?] {}


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

你的游戏遇到了一些问题，这可能是某些 Mod 所引起的，PCL 找到了一个可疑的关键词：x3rmination。

如果你知道它对应的 Mod，那么有可能就是它引起的错误，你也可以查看错误报告获取详情。

你的模组列表里有没有 SelectEntityRemoval 这个模组？
如果有的话删掉看看。

发一下你的mod列表

minecraft与mod版本不同