---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 23.01.21 20:18
Description: Exception in server tick loop

java.util.concurrent.CompletionException: u: Exception generating new chunk
	at java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source)
	at java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source)
	at java.util.concurrent.CompletableFuture.uniCompose(Unknown Source)
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(Unknown Source)
	at java.util.concurrent.CompletableFuture$Completion.run(Unknown Source)
	at aak.b(SourceFile:58)
	at aoz.e(SourceFile:94)
	at aoz.a(SourceFile:137)
	at aoz.run(SourceFile:105)
	at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(Unknown Source)
	at java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(Unknown Source)
	at java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
	at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)
Caused by: u: Exception generating new chunk
	at aai.a(SourceFile:573)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at aai.a(SourceFile:556)
	... 12 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: 19
	at cjq.b(SourceFile:216)
	at cly.a(SourceFile:615)
	at cjb.f(SourceFile:71)
	at cjb$d.doWork(SourceFile:263)
	at cjb.a(SourceFile:219)
	at aai.a(SourceFile:562)
	... 14 more


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

-- System Details --
Details:
	Minecraft Version: 21w03a
	Minecraft Version ID: 21w03a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_241, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 2934413920 bytes (2798 MB) / 3992977408 bytes (3808 MB) up to 4294967296 bytes (4096 MB)
	CPUs: 8
	JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Player Count: 1 / 8; [aaw['miwob'/222, l='ServerLevel[New World]', x=-53.15, y=67.00, z=111.22]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.