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

Time: 31.05.18 06:02
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
	at bca.a(SourceFile:479)
	at brp.g(SourceFile:85)
	at brp.<init>(SourceFile:60)
	at bqc.create(SourceFile:50)
	at brf.n(SourceFile:81)
	at sm.p(SourceFile:598)
	at sm.<init>(SourceFile:131)
	at dik.a(SourceFile:97)
	at dik.d(SourceFile:132)
	at net.minecraft.server.MinecraftServer.run(SourceFile:501)
	at java.lang.Thread.run(Unknown Source)


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: 18w22b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_171, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 813667280 bytes (775 MB) / 1238368256 bytes (1181 MB) up to 2863661056 bytes (2731 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.