---- Minecraft Crash Report ----
// There are four lights!

Time: 5/11/20 2:19 PM
Description: Exception in server tick loop

java.lang.RuntimeException: Failed to check session lock, aborting
	at crn.h(SourceFile:95)
	at crn.<init>(SourceFile:51)
	at crp.a(SourceFile:113)
	at crp.a(SourceFile:109)
	at net.minecraft.server.MinecraftServer.a(SourceFile:360)
	at wd.d(SourceFile:219)
	at net.minecraft.server.MinecraftServer.run(SourceFile:628)
	at java.lang.Thread.run(Thread.java:748)


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: 1.15.2
	Minecraft Version ID: 1.15.2
	Operating System: FreeBSD (amd64) version 11.3-RELEASE-p7
	Java Version: 1.8.0_252, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 883765448 bytes (842 MB) / 1008730112 bytes (962 MB) up to 1008730112 bytes (962 MB)
	CPUs: 4
	JVM Flags: 2 total; -Xmx1024M -Xms1024M
	Player Count: 0 / 20; []
	Data Packs:
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)