---- Minecraft Crash Report ----
// Shall we play a game?

Time: 7/30/20 12:21 AM
Description: Exception in server tick loop

java.lang.IllegalStateException: Unregistered dimension type: cgy@6c988822
	at net.minecraft.server.MinecraftServer.a(SourceFile:407)
	at net.minecraft.server.MinecraftServer$$Lambda$4260/1449623611.get(Unknown Source)
	at java.util.Optional.orElseThrow(Optional.java:290)
	at net.minecraft.server.MinecraftServer.a(SourceFile:407)
	at net.minecraft.server.MinecraftServer.l_(SourceFile:333)
	at emv.d(SourceFile:68)
	at net.minecraft.server.MinecraftServer.w(SourceFile:646)
	at net.minecraft.server.MinecraftServer.a(SourceFile:255)
	at net.minecraft.server.MinecraftServer$$Lambda$4082/309009222.run(Unknown Source)
	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: 1.16.2 Pre-release 1
	Minecraft Version ID: 1.16.2-pre1
	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: 627731552 bytes (598 MB) / 2013265920 bytes (1920 MB) up to 2147483648 bytes (2048 MB)
	CPUs: 8
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Player Count: 0 / 8; []
	Data Packs: vanilla, file/custom
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.