Preparing spawn area hangs on loading world

Encountered an unexpected exception
java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: Index (0) is greater than or equal to list size (0)
	at net.minecraft.server.MinecraftServer.g_(SourceFile:390)
	at dhq.a(SourceFile:116)
	at dhq.d(SourceFile:132)
	at net.minecraft.server.MinecraftServer.run(SourceFile:497)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: Index (0) is greater than or equal to list size (0)
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2272)
	at net.minecraft.server.MinecraftServer.g_(SourceFile:388)
	... 4 more
Caused by: java.lang.IndexOutOfBoundsException: Index (0) is greater than or equal to list size (0)
	at it.unimi.dsi.fastutil.longs.LongArrayList.removeLong(LongArrayList.java:346)
	at it.unimi.dsi.fastutil.longs.LongArrayList.rem(LongArrayList.java:357)
	at it.unimi.dsi.fastutil.longs.AbstractLongList.remove(AbstractLongList.java:455)
	at bze.c(SourceFile:35)
	at bvq.a(SourceFile:308)
	at bvq.a(SourceFile:235)
	at bvq.a(SourceFile:80)
	at bxw.a(SourceFile:16)
	at bxw.a(SourceFile:13)
	at brt.a(SourceFile:27)
	at bbv.a(SourceFile:515)
	at bpg.a(SourceFile:109)
	at sx.a(SourceFile:12)
	at sw.a(SourceFile:33)
	at bpk.a(SourceFile:85)
	at tc.a(SourceFile:59)
	at tc.a(SourceFile:23)
	at agd$a.a(SourceFile:143)
	at agd$a$$Lambda$1412/876805550.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

This crash report has been saved to: C:\Users\Maximilian\AppData\Roaming\.minecraft\.snapshots\crash-reports\crash-2018-05-15_17.47.57-server.txt

Couldn't stop taskManager
java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: Index (0) is greater than or equal to list size (0)
	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2237)
	at agd.b(SourceFile:92)
	at agf.a(SourceFile:23)
	at si.close(SourceFile:267)
	at bbb.close(SourceFile:1651)
	at sj.close(SourceFile:930)
	at net.minecraft.server.MinecraftServer.h_(SourceFile:469)
	at dhq.h_(SourceFile:312)
	at net.minecraft.server.MinecraftServer.run(SourceFile:560)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IndexOutOfBoundsException: Index (0) is greater than or equal to list size (0)
	at it.unimi.dsi.fastutil.longs.LongArrayList.removeLong(LongArrayList.java:346)
	at it.unimi.dsi.fastutil.longs.LongArrayList.rem(LongArrayList.java:357)
	at it.unimi.dsi.fastutil.longs.AbstractLongList.remove(AbstractLongList.java:455)
	at bze.c(SourceFile:35)
	at bvq.a(SourceFile:308)
	at bvq.a(SourceFile:235)
	at bvq.a(SourceFile:80)
	at bxw.a(SourceFile:16)
	at bxw.a(SourceFile:13)
	at brt.a(SourceFile:27)
	at bbv.a(SourceFile:515)
	at bpg.a(SourceFile:109)
	at sx.a(SourceFile:12)
	at sw.a(SourceFile:33)
	at bpk.a(SourceFile:85)
	at tc.a(SourceFile:59)
	at tc.a(SourceFile:23)
	at agd$a.a(SourceFile:143)
	at agd$a$$Lambda$1412/876805550.apply(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncApply.exec(CompletableFuture.java:501)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:902)
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1689)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1644)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)