GroupManager not working.

[tommynov1000]

11:28 PM [sEVERE] Exception in thread "AWT-EventQueue-0"

11:28 PM [sEVERE] org.bukkit.command.CommandException: Unhandled exception executing command 'manpromote' in plugin GroupManager v1.9 (2.8.2) (Phoenix)

11:28 PM [sEVERE] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:42)

11:28 PM [sEVERE] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:168)

11:28 PM [sEVERE] at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:403)

11:28 PM [sEVERE] at me.escapeNT.pail.GUIComponents.ServerConsolePanel$ConsoleCommandListener.actionPerformed(ServerConsolePanel.java:69)

11:28 PM [sEVERE] at javax.swing.JTextField.fireActionPerformed(Unknown Source)

11:28 PM [sEVERE] at javax.swing.JTextField.postActionEvent(Unknown Source)

11:28 PM [sEVERE] at javax.swing.JTextField$NotifyAction.actionPerformed(Unknown Source)

11:28 PM [sEVERE] at javax.swing.SwingUtilities.notifyAction(Unknown Source)

11:28 PM [sEVERE] at javax.swing.JComponent.processKeyBinding(Unknown Source)

11:28 PM [sEVERE] at javax.swing.JComponent.processKeyBindings(Unknown Source)

11:28 PM [sEVERE] at javax.swing.JComponent.processKeyEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.Component.processEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.Container.processEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.Component.dispatchEventImpl(Unknown Source)

11:28 PM [sEVERE] at java.awt.Container.dispatchEventImpl(Unknown Source)

11:28 PM [sEVERE] at java.awt.Component.dispatchEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)

11:28 PM [sEVERE] at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.Component.dispatchEventImpl(Unknown Source)

11:28 PM [sEVERE] at java.awt.Container.dispatchEventImpl(Unknown Source)

11:28 PM [sEVERE] at java.awt.Window.dispatchEventImpl(Unknown Source)

11:28 PM [sEVERE] at java.awt.Component.dispatchEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventQueue.dispatchEventImpl(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventQueue.access$000(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventQueue$3.run(Unknown Source)

11:28 PM [sEVERE] at java.security.AccessController.doPrivileged(Native Method)

11:28 PM [sEVERE] at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventQueue$4.run(Unknown Source)

11:28 PM [sEVERE] at java.security.AccessController.doPrivileged(Native Method)

11:28 PM [sEVERE] at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventQueue.dispatchEvent(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

11:28 PM [sEVERE] at java.awt.EventDispatchThread.run(Unknown Source)

11:28 PM [sEVERE] Caused by: java.lang.NullPointerException

11:28 PM [sEVERE] at org.anjocaido.groupmanager.GroupManager.setDefaultWorldHandler(GroupManager.java:1763)

11:28 PM [sEVERE] at org.anjocaido.groupmanager.GroupManager.onCommand(GroupManager.java:1571)

11:28 PM [sEVERE] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)

11:28 PM [sEVERE] ... 42 more

Thats the log it gives me when I type a command such as /manpromote in the console. I have taken off CommandBook, yet it still does not fix the problem.