java.lang.RuntimeException: There is no default group set, this is a serious issue
    at ru.tehkode.permissions.backends.SQLBackend.getDefaultGroup(SQLBackend.java:103)
    at ru.tehkode.permissions.PermissionManager.getDefaultGroup(PermissionManager.java:288)
    at ru.tehkode.permissions.PermissionManager.getDefaultGroup(PermissionManager.java:277)
    at ru.tehkode.permissions.PermissionUser.getGroups(PermissionUser.java:221)
    at ru.tehkode.permissions.PermissionUser.getOption(PermissionUser.java:132)
    at ru.tehkode.permissions.PermissionEntity.getOptionBoolean(PermissionEntity.java:298)
    at ru.tehkode.permissions.PermissionEntity.initialize(PermissionEntity.java:57)
    at ru.tehkode.permissions.PermissionUser.initialize(PermissionUser.java:53)
    at ru.tehkode.permissions.ProxyPermissionUser.initialize(ProxyPermissionUser.java:41)
    at ru.tehkode.permissions.PermissionManager.getUser(PermissionManager.java:115)
    at ru.tehkode.permissions.PermissionManager.has(PermissionManager.java:90)
    at com.sk89q.wepif.PermissionsExResolver.hasPermission(PermissionsExResolver.java:63)
    at com.sk89q.wepif.PermissionsExResolver.hasPermission(PermissionsExResolver.java:88)
    at com.sk89q.wepif.PermissionsResolverManager.hasPermission(PermissionsResolverManager.java:160)
    at com.sk89q.worldedit.bukkit.BukkitPlayer.hasPermission(BukkitPlayer.java:119)
    at com.sk89q.worldedit.WorldEdit.getSession(WorldEdit.java:237)
    at com.sk89q.worldedit.bukkit.WorldEditPlugin.onDisable(WorldEditPlugin.java:123)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
    at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:362)
    at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:399)
    at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:392)
    at org.bukkit.craftbukkit.CraftServer.disablePlugins(CraftServer.java:245)
    at net.minecraft.server.MinecraftServer.stop(MinecraftServer.java:399)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:479)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
2012-04-05 04:41:03 [INFO] [CoreProtect] Disabling CoreProtect v1.33
2012-04-05 04:41:03 [INFO] [PermissionsEx] Disabling PermissionsEx v1.19.1
2012-04-05 04:41:03 [INFO] [PermissionsEx] v1.19.1 disabled successfully.
2012-04-05 04:41:03 [INFO] [LWC] Disabling LWC v4.1.1 (b645-git-b24cc99e)
2012-04-05 04:41:03 [INFO] Essentials: Using config based permissions. Enable superperms in config.
2012-04-05 04:41:03 [INFO] LWC: Flushing protection updates (0)
2012-04-05 04:41:03 [INFO] LWC: Freeing SQLite
2012-04-05 04:41:03 [INFO] [FroghouseDB] Disabling FroghouseDB v1.1
2012-04-05 04:41:03 [INFO] FroghouseDB: Froghouse: Disabled
2012-04-05 04:41:03 [INFO] [MobDisguise] Disabling MobDisguise v1.8
2012-04-05 04:41:03 [INFO] [MobDisguise] by desmin88 version 1.8 disabled.
2012-04-05 04:41:03 [INFO] [mcMMO] Disabling mcMMO v1.3.04-b576
2012-04-05 04:41:03 [INFO] mcMMO was disabled.
2012-04-05 04:41:03 [INFO] [WorldGuard] Disabling WorldGuard v5.5.1
2012-04-05 04:41:03 [INFO] [Essentials] Disabling Essentials v2.8.4
2012-04-05 04:41:03 [INFO] [ChatManager] Disabling ChatManager v1.19
2012-04-05 04:41:03 [INFO] [ChatManager] ChatManager disabled!
2012-04-05 04:41:03 [INFO] [EssentialsProtect] Disabling EssentialsProtect v2.8.4
2012-04-05 04:41:04 [INFO] [EssentialsSpawn] Disabling EssentialsSpawn v2.8.4
2012-04-05 04:41:04 [INFO] [EssentialsChat] Disabling EssentialsChat v2.8.4
2012-04-05 04:41:04 [INFO] [Modifyworld] Disabling Modifyworld v1.19
2012-04-05 04:41:04 [INFO] [Modifyworld] Modifyworld disabled!
2012-04-05 04:41:04 [INFO] Saving chunks
2012-04-05 04:41:04 [INFO] Stopping server
2012-04-05 04:41:04 [INFO] Saving chunks