Description: Exception ticking world entities

java.lang.NullPointerException: Exception ticking world entities
	at axu.l(SourceFile:1087)
	at tc.l(SourceFile:493)
	at net.minecraft.server.MinecraftServer.b(SourceFile:736)
	at net.minecraft.server.MinecraftServer.a(SourceFile:661)
	at dfz.a(SourceFile:158)
	at net.minecraft.server.MinecraftServer.run(SourceFile:564)
	at java.lang.Thread.run(Thread.java:745)