AMinecraftPlayer

Minecraft Bukkit Server Error
Error 1.: commands / pex user
18:18:24 [WARNING] Unexpected exception while parsing console command
org.bukkit.command.CommandException: Unhandled exception executing command 'pex' in plugin PermissionsEx v1.17
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:165)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:378)
        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:374)
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:564)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:541)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: There is no default group set, this is a serious issue
        at ru.tehkode.permissions.commands.CommandsManager.execute(CommandsManager.java:127)
        at ru.tehkode.permissions.bukkit.PermissionsEx.onCommand(PermissionsEx.java:124)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
        ... 7 more
Caused by: java.lang.RuntimeException: There is no default group set, this is a serious issue
        at ru.tehkode.permissions.backends.SQLBackend.getDefaultGroup(SQLBackend.java:104)
        at ru.tehkode.permissions.PermissionManager.getDefaultGroup(PermissionManager.java:285)
        at ru.tehkode.permissions.PermissionManager.getDefaultGroup(PermissionManager.java:274)
        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.backends.sql.SQLUser.initialize(SQLUser.java:41)
        at ru.tehkode.permissions.PermissionManager.getUser(PermissionManager.java:116)
        at ru.tehkode.permissions.backends.SQLBackend.getRegisteredUsers(SQLBackend.java:156)
        at ru.tehkode.permissions.PermissionBackend.getUsers(PermissionBackend.java:204)
        at ru.tehkode.permissions.PermissionManager.getUsers(PermissionManager.java:140)
        at ru.tehkode.permissions.bukkit.commands.UserCommands.usersList(UserCommands.java:44)
        at ru.tehkode.permissions.bukkit.commands.UserCommands.userListAnotherAlias(UserCommands.java:66)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at ru.tehkode.permissions.commands.CommandsManager$CommandBinding.call(CommandsManager.java:260)
        at ru.tehkode.permissions.commands.CommandsManager.execute(CommandsManager.java:120)
        ... 9 more

Error 2: Player login ( think it´s Permissions for CommandBook )
18:21:21 [SEVERE] Could not pass event PLAYER_JOIN to CommandBook
java.lang.RuntimeException: There is no default group set, this is a seriousissue
        at ru.tehkode.permissions.backends.SQLBackend.getDefaultGroup(SQLBackend.java:104)
        at ru.tehkode.permissions.PermissionManager.getDefaultGroup(PermissionManager.java:285)
        at ru.tehkode.permissions.PermissionManager.getDefaultGroup(PermissionManager.java:274)
        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.backends.sql.SQLUser.initialize(SQLUser.java:41)
        at ru.tehkode.permissions.PermissionManager.getUser(PermissionManager.java:116)
        at com.sk89q.wepif.PermissionsExResolver.getGroups(PermissionsExResolver.java:75)
        at com.sk89q.wepif.PermissionsResolverManager.getGroups(PermissionsResolverManager.java:152)
        at com.sk89q.bukkit.migration.PermissionsResolverManager.getGroups(PermissionsResolverManager.java:71)
        at com.sk89q.commandbook.CommandBookUtil.sendOnlineList(CommandBookUtil.java:129)
        at com.sk89q.commandbook.CommandBookPlayerListener.onPlayerJoin(CommandBookPlayerListener.java:138)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:265)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
        at net.minecraft.server.ServerConfigurationManager.c(ServerConfigurationManager.java:129)
        at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:113)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:39)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:94)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:527)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)