---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 8/6/20 2:58 PM
Description: Ticking player

java.lang.IllegalStateException: Unregistered biome
	at bw.b(SourceFile:88)
	at bw$$Lambda$4691/255883376.get(Unknown Source)
	at java.util.Optional.orElseThrow(Optional.java:290)
	at bw.a(SourceFile:88)
	at bw.a(SourceFile:68)
	at bx$a.a(SourceFile:55)
	at bx.a(SourceFile:31)
	at bx$$Lambda$4689/641940096.test(Unknown Source)
	at ck.a(SourceFile:62)
	at bx.a(SourceFile:31)
	at aah.v_(SourceFile:484)
	at aay.b(SourceFile:207)
	at nd.a(SourceFile:234)
	at aax.c(SourceFile:173)
	at net.minecraft.server.MinecraftServer.b(SourceFile:881)
	at net.minecraft.server.MinecraftServer.a(SourceFile:810)
	at emy.a(SourceFile:92)
	at net.minecraft.server.MinecraftServer.w(SourceFile:669)
	at net.minecraft.server.MinecraftServer.a(SourceFile:254)
	at net.minecraft.server.MinecraftServer$$Lambda$4136/571704818.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:
---------------------------------------------------------------------------------------

-- Head --
Thread: Server thread
Stacktrace:
	at bw.b(SourceFile:88)
	at bw$$Lambda$4691/255883376.get(Unknown Source)
	at java.util.Optional.orElseThrow(Optional.java:290)
	at bw.a(SourceFile:88)
	at bw.a(SourceFile:68)
	at bx$a.a(SourceFile:55)
	at bx.a(SourceFile:31)
	at bx$$Lambda$4689/641940096.test(Unknown Source)
	at ck.a(SourceFile:62)
	at bx.a(SourceFile:31)

-- Player being ticked --
Details:
	Entity Type: minecraft:player (aah)
	Entity ID: 36
	Entity Name: misode
	Entity's Exact location: 0.50, 0.00, 0.50
	Entity's Block location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 0.00, 0.00, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aah.v_(SourceFile:484)
	at aay.b(SourceFile:207)
	at nd.a(SourceFile:234)
	at aax.c(SourceFile:173)
	at net.minecraft.server.MinecraftServer.b(SourceFile:881)
	at net.minecraft.server.MinecraftServer.a(SourceFile:810)
	at emy.a(SourceFile:92)
	at net.minecraft.server.MinecraftServer.w(SourceFile:669)
	at net.minecraft.server.MinecraftServer.a(SourceFile:254)
	at net.minecraft.server.MinecraftServer$$Lambda$4136/571704818.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.16.2 Pre-release 2
	Minecraft Version ID: 1.16.2-pre2
	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: 1273072968 bytes (1214 MB) / 2147483648 bytes (2048 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: 1 / 8; [aah['misode'/36, l='ServerLevel[Dimensions]', x=0.50, y=0.00, z=0.50]]
	Data Packs: vanilla, file/testing, file/invalid_biome_id
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.