CompletionException: m: Exception generating new chunk

The game crashed whilst exception in server tick loop
Error: java.util.concurrent.CompletionException: m: Exception generating new chunk

---- Minecraft Crash Report ----
// You're mean.

Time: 03/05/19 18.25
Description: Exception in server tick loop

java.util.concurrent.CompletionException: m: Exception generating new chunk
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:961)
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:926)
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:442)
	at uu.b(SourceFile:57)
	at uu$$Lambda$2543/1658068344.run(Unknown Source)
	at agk.e(SourceFile:83)
	at agk.a(SourceFile:123)
	at agk.run(SourceFile:91)
	at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)Caused by: m: Exception generating new chunk
	at us.a(SourceFile:472)
	at us$$Lambda$2545/646894559.apply(Unknown Source)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at us.a(SourceFile:455)
	at us$$Lambda$2493/1120272296.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture.uniCompose(CompletableFuture.java:952)
	... 12 more

Caused by: java.lang.RuntimeException: We are asking a region for a chunk out of bound | 22 87
	at vm.a(SourceFile:123)
	at bhk.a(SourceFile:100)
	at vm.a(SourceFile:92)
	at cej.a(SourceFile:67)
	at cab.a(SourceFile:36)
	at cgt.a(SourceFile:85)
	at cgt$$Lambda$3186/1239559784.accept(Unknown Source)
	at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419)
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
	at cgt.a(SourceFile:84)
	at cfv.a(SourceFile:35)
	at caj.a(SourceFile:20)
	at caj.a(SourceFile:13)
	at cab.a(SourceFile:36)
	at bie.a(SourceFile:385)
	at bwy.a(SourceFile:126)
	at bxc.c(SourceFile:75)
	at bxc$$Lambda$1049/208108926.doWork(Unknown Source)
	at bxc.a(SourceFile:199)
	at us.a(SourceFile:461) ... 17 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- System Details --
Details:
	Minecraft Version: 1.14
	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: 2598371320 bytes (2477 MB) / 3892314112 bytes (3712 MB) up to 4294967296 bytes (4096 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
	Player Count: 1 / 8; [vh['ThisDefe'/682, l='§b Ｃ Ｏ Ｌ Ｏ Ｎ Ｉ Ｚ Ｅ Ｄ', x=35.44, y=62.80, z=1140.64]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.