Game crashes with NullPointerException: Exception generating new chunk

Good day, dear support service. I ran into a problem when going to hell. I play survival in a single player game and when I go to hell, a game crashes. The portal tried to put in different places the situation is repeated. The file contains an error in the attachment. I really hope for your help since a lot of effort has been put into this safe. Waiting for feedback. Thank!!!!

Stack trace

1.15.2\: [^crash-2020-05-11_00.24.51-server.txt]

Description: Exception generating new chunk

java.lang.NullPointerException: Exception generating new chunk
	at caa.a(SourceFile:221)
	at cae.h(SourceFile:62)
	at cae$$Lambda$1103/856000892.doWork(Unknown Source)
	at cae$d.doWork(SourceFile:258)
	at cae.a(SourceFile:214)
	at wp.a(SourceFile:549)
	at wp$$Lambda$2983/2138748572.apply(Unknown Source)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at wp.a(SourceFile:543)
	at wp$$Lambda$2980/1501875736.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
	at wr.b(SourceFile:58)
	at wr$$Lambda$2948/1847015375.run(Unknown Source)
	at aiv.e(SourceFile:83)
	at aiv.a(SourceFile:123)
	at aiv.run(SourceFile:91)
	at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)