Game crashes evry time when I enter the nether

We do not have enough information to find the cause of this issue.

Please attach the crash report found in [minecraft/crash-reports/crash-<DATE>-client.txt|https://minecrafthopper.net/help/guides/finding-minecraft-data-folder/] here.
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Minecraft Crash Report ----
// Don't do that.

Time: 6/20/20 9:12 AM
Description: Exception generating new chunk

java.lang.NullPointerException: Exception generating new chunk
at caa.a(SourceFile:221)
at cae.h(SourceFile:62)
at cae$$Lambda$1107/29401411.doWork(Unknown Source)
at cae$d.doWork(SourceFile:258)
at cae.a(SourceFile:214)
at wp.a(SourceFile:549)
at wp$$Lambda$3008/1926253268.apply(Unknown Source)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at wp.a(SourceFile:543)
at wp$$Lambda$3005/195475418.apply(Unknown Source)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at wr.b(SourceFile:58)
at wr$$Lambda$2951/1821129226.run(Unknown Source)
at aiv.e(SourceFile:83)
at aiv.a(SourceFile:123)
at aiv.run(SourceFile:91)
at java.util.concurrent.ForkJoinTask$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)

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

– Head –
Thread: Server thread
Stacktrace:
at caa.a(SourceFile:221)
at cae.h(SourceFile:62)
at cae$$Lambda$1107/29401411.doWork(Unknown Source)
at cae$d.doWork(SourceFile:258)
at cae.a(SourceFile:214)

– Chunk to be generated –
Details:
Location: -18,-10
Position hash: -38654705682
Generator: cbx@764eda8a
Stacktrace:
at wp.a(SourceFile:549)
at wp$$Lambda$3008/1926253268.apply(Unknown Source)
at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
at wp.a(SourceFile:543)
at wp$$Lambda$3005/195475418.apply(Unknown Source)
at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
at wr.b(SourceFile:58)
at wr$$Lambda$2951/1821129226.run(Unknown Source)
at aiv.e(SourceFile:83)
at aiv.a(SourceFile:123)
at aiv.run(SourceFile:91)

– Affected level –
Details:
All players: 1 total; [xe['higherthehair'/13580, l='JJ's Domain', x=-129.58, y=95.00, z=17.50]]
Chunk stats: ServerChunkCache: 1575
Level dimension: minecraft:the_nether
Derived: true
Level name: JJ's Domain
Level seed: -3189725484464632487
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options: {}
Level spawn location: World: (101,63,-17), Chunk: (at 5,3,15 in 6,-2; contains blocks 96,0,-32 to 111,255,-17), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 9176087 game time, 13227323 day time
Known server brands: vanilla
Level was modded: false
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 64187 (now: false), thunder time: 101742 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.b(SourceFile:857)
at net.minecraft.server.MinecraftServer.a(SourceFile:793)
at edm.a(SourceFile:130)
at net.minecraft.server.MinecraftServer.run(SourceFile:655)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 1.15.2
Minecraft Version ID: 1.15.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 685276552 bytes (653 MB) / 2013265920 bytes (1920 MB) up to 2147483648 bytes (2048 MB)
CPUs: 12
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Player Count: 1 / 8; [xe['higherthehair'/13580, l='JJ's Domain', x=-129.58, y=95.00, z=17.50]]
Data Packs: vanilla
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

Duplicate of MC-37075

No, this is actually MC-183468