ERROR

[WorldGuard] WorldGuard encountered an unexpected error
java.lang.NullPointerException: null
        at com.sk89q.worldguard.bukkit.RegionContainer.getSaveFailures(RegionContainer.java:254) ~[worldguard-6.2.1.jar:?]
        at com.sk89q.worldguard.bukkit.commands.region.RegionCommandsBase.warnAboutSaveFailures(RegionCommandsBase.java:298) ~[worldguard-6.2.1.jar:?]
        at com.sk89q.worldguard.bukkit.commands.region.RegionCommands.list(RegionCommands.java:412) ~[worldguard-6.2.1.jar:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_131]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_131]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_131]
        at com.sk89q.minecraft.util.commands.CommandsManager.invokeMethod(CommandsManager.java:528) ~[worldedit-bukkit-6.1.7.2.jar:?]
        at com.sk89q.minecraft.util.commands.CommandsManager.executeMethod(CommandsManager.java:516) ~[worldedit-bukkit-6.1.7.2.jar:?]
        at com.sk89q.minecraft.util.commands.CommandsManager.executeMethod(CommandsManager.java:471) ~[worldedit-bukkit-6.1.7.2.jar:?]
        at com.sk89q.minecraft.util.commands.CommandsManager.execute(CommandsManager.java:409) ~[worldedit-bukkit-6.1.7.2.jar:?]
        at com.sk89q.worldguard.bukkit.WorldGuardPlugin.onCommand(WorldGuardPlugin.java:295) [worldguard-6.2.1.jar:?]
        at com.sk89q.bukkit.util.DynamicPluginCommand.execute(DynamicPluginCommand.java:54) [worldedit-bukkit-6.1.7.2.jar:?]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot.jar:git-Spigot-99c2a37-c1b8cac]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:645) [spigot.jar:git-Spigot-99c2a37-c1b8cac]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:631) [spigot.jar:git-Spigot-99c2a37-c1b8cac]
        at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:443) [spigot.jar:git-Spigot-99c2a37-c1b8cac]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot.jar:git-Spigot-99c2a37-c1b8cac]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:678) [spigot.jar:git-Spigot-99c2a37-c1b8cac]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:576) [spigot.jar:git-Spigot-99c2a37-c1b8cac]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
[19:39:14 INFO]: WorldGuard: An unexpected error occurred! Please see the server console.
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