Решено При вводе комманды и нажатие TAB краш

См тему.
Когда игрок вводит комманду и для ускорения ввода жмет TAB происходит краш
код не весь

Код:

---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 12/2/15 3:10 PM
Description: Exception in server tick loop

java.lang.NoSuchMethodError: org.bukkit.OfflinePlayer.getUniqueId()Ljava/util/UUID;
    at com.sk89q.wepif.PermissionsExResolver.hasPermission(PermissionsExResolver.java:68)
    at com.sk89q.wepif.PermissionsResolverManager.hasPermission(PermissionsResolverManager.java:173)
    at com.sk89q.worldedit.bukkit.BukkitPlayer.hasPermission(BukkitPlayer.java:144)
    at com.sk89q.worldedit.internal.command.ActorAuthorizer.testPermission(ActorAuthorizer.java:37)
    at com.sk89q.worldedit.util.command.parametric.ParametricCallable.testPermission(ParametricCallable.java:297)
    at com.sk89q.worldedit.bukkit.BukkitCommandInspector.testPermission(BukkitCommandInspector.java:77)
    at com.sk89q.bukkit.util.DynamicPluginCommand.testPermissionSilent(DynamicPluginCommand.java:99)
    at org.bukkit.command.SimpleCommandMap.tabComplete(SimpleCommandMap.java:253)
    at org.bukkit.craftbukkit.v1_6_R3.CraftServer.tabCompleteCommand(CraftServer.java:1343)
    at org.bukkit.craftbukkit.v1_6_R3.CraftServer.tabComplete(CraftServer.java:1334)
    at net.minecraft.server.v1_6_R3.MinecraftServer.a(MinecraftServer.java:902)
    at net.minecraft.server.v1_6_R3.PlayerConnection.a(PlayerConnection.java:1656)
    at net.minecraft.server.v1_6_R3.Packet203TabComplete.handle(SourceFile:33)
    at net.minecraft.server.v1_6_R3.NetworkManager.b(NetworkManager.java:296)
    at net.minecraft.server.v1_6_R3.PlayerConnection.e(PlayerConnection.java:116)
    at net.minecraft.server.v1_6_R3.ServerConnection.b(SourceFile:37)
    at net.minecraft.server.v1_6_R3.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.v1_6_R3.MinecraftServer.t(MinecraftServer.java:592)
    at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:227)
    at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:488)
    at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:421)
    at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)


A detailed walkthrough of the error, its code path and all known details is as follows:
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Такая же проблема сменил ядро на PaperSpigot всё стало на свои места
Только после установки этого ядра обновил WorldEdit до 6.1