[16:17:23 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'mw' in plugin MultiWorld v5.2.8
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[server.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[server.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) ~[server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1397) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1232) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [server.jar:git-Spigot-4bd94dc-fb414fe]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_192]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_192]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [server.jar:git-Spigot-4bd94dc-fb414fe]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [server.jar:git-Spigot-4bd94dc-fb414fe]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_192]
Caused by: net.minecraft.server.v1_12_R1.ReportedException: Exception initializing level
at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:937) ~[server.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.createWorld(CraftServer.java:912) ~[server.jar:git-Spigot-4bd94dc-fb414fe]
at org.bukkit.Bukkit.createWorld(Bukkit.java:454) ~[server.jar:git-Spigot-4bd94dc-fb414fe]
at multiworld.data.WorldManager.loadWorld(WorldManager.java:347) ~[?:?]
at multiworld.data.WorldHandler.loadWorld(WorldHandler.java:129) ~[?:?]
at multiworld.command.world.LoadWorldCommand.runCommand(LoadWorldCommand.java:56) ~[?:?]
at multiworld.command.Command.excute(Command.java:55) ~[?:?]
at multiworld.command.CommandMap.parseCommand(CommandMap.java:37) ~[?:?]
at multiworld.command.CommandMap.runCommand(CommandMap.java:67) ~[?:?]
at multiworld.command.Command.excute(Command.java:55) ~[?:?]
at multiworld.MultiWorldPlugin.pushCommandStack(MultiWorldPlugin.java:221) ~[?:?]
at multiworld.MultiWorldPlugin.onCommand(MultiWorldPlugin.java:206) ~[?:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[server.jar:git-Spigot-4bd94dc-fb414fe]
... 15 more
Caused by