---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 30/11/21 20:27
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
	at tx.a(SourceFile:97)
	at tc.a(SourceFile:211)
	at td.a(SourceFile:728)
	at net.minecraft.server.MinecraftServer.a(SourceFile:508)
	at dgg.a(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:584)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 1.13.1
	Operating System: Mac OS X (x86_64) version 10.11.6
	Java Version: 1.8.0_74, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 528887920 bytes (504 MB) / 973078528 bytes (928 MB) up to 2147483648 bytes (2048 MB)
	JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [tf['Player'/277, l='Demo_World', x=-311.47, y=65.00, z=-241.59]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.