Game Crash Everytime Upon Opening World

Time: 8/2/18 12:43 PM
Description: Exception generating new chunk

java.util.concurrent.ExecutionException: java.lang.RuntimeException: We are asking a region for a chunk out of bound | 21 167
	at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357)
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1887)
	at tb.c(SourceFile:126)
	at tj.a(SourceFile:85)
	at tk.c(SourceFile:123)
	at tc.i_(SourceFile:220)
	at net.minecraft.server.MinecraftServer.w(SourceFile:723)
	at net.minecraft.server.MinecraftServer.v(SourceFile:656)
	at dfx.v(SourceFile:157)
	at net.minecraft.server.MinecraftServer.run(SourceFile:559)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: We are asking a region for a chunk out of bound | 21 167
	at th.c(SourceFile:118)
	at axt.y(SourceFile:45)
	at th.a(SourceFile:277)
	at byf.a(SourceFile:50)
	at byi.a(SourceFile:38)
	at tt.a(SourceFile:21)
	at tp.a(SourceFile:35)
	at bmu.a(SourceFile:95)
	at tw.a(SourceFile:62)
	at tw.a(SourceFile:25)
	at acr$a.a(SourceFile:130)
	at acr$a$$Lambda$1778/895600182.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
	at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)