[Server thread/ERROR]: Encountered an unexpected exception
z: Exception initializing level
    at net.minecraft.server.MinecraftServer.a(SourceFile:393) ~[server.jar:?]
    at net.minecraft.server.MinecraftServer.e_(SourceFile:338) ~[server.jar:?]
    at aam.e(SourceFile:180) ~[server.jar:?]
    at net.minecraft.server.MinecraftServer.x(SourceFile:649) ~[server.jar:?]
    at net.minecraft.server.MinecraftServer.a(SourceFile:261) ~[server.jar:?]
    at java.lang.Thread.run(Thread.java:831) [?:?]
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 47 out of bounds for length 33
    at cpd.a(SourceFile:102) ~[server.jar:?]
    at cpb.a(SourceFile:456) ~[server.jar:?]
    at java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?]
    at cpb.a(SourceFile:456) ~[server.jar:?]
    at cpb.b(SourceFile:410) ~[server.jar:?]
    at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1764) ~[?:?]
    at java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1756) ~[?:?]
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295) ~[?:?]
    at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?]
    at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?]
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?]
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?]