java.util.MissingResourceException: Can't find resource for bundle org.openide.util.NbBundle$PBundle, key MSG_InvalidPackageName
        at java.util.ResourceBundle.getObject(ResourceBundle.java:325)
        at java.util.ResourceBundle.getString(ResourceBundle.java:285)
        at org.openide.util.NbBundle.getMessage(NbBundle.java:629)
        at org.netbeans.modules.python.project.ui.TreeRootNode$PackageFilterNode.setName(TreeRootNode.java:287)
        at org.openide.nodes.FilterNode.setName(FilterNode.java:495)
        at org.openide.explorer.view.TreeViewCellEditor.editingStopped(TreeViewCellEditor.java:137)
        at javax.swing.AbstractCellEditor.fireEditingStopped(AbstractCellEditor.java:124)
        at javax.swing.DefaultCellEditor$EditorDelegate.stopCellEditing(DefaultCellEditor.java:334)
        at javax.swing.DefaultCellEditor.stopCellEditing(DefaultCellEditor.java:219)
        at javax.swing.DefaultCellEditor$EditorDelegate.actionPerformed(DefaultCellEditor.java:351)
        at javax.swing.JTextField.fireActionPerformed(JTextField.java:487)
        at javax.swing.JTextField.postActionEvent(JTextField.java:668)
        at javax.swing.JTextField$NotifyAction.actionPerformed(JTextField.java:783)
        at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1571)
        at javax.swing.JComponent.processKeyBinding(JComponent.java:2772)
        at javax.swing.JComponent.processKeyBindings(JComponent.java:2807)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2735)
        at java.awt.Component.processEvent(Component.java:5294)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3984)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3819)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1826)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:681)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:938)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:810)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:645)
        at java.awt.Component.dispatchEventImpl(Component.java:3857)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Window.dispatchEventImpl(Window.java:1791)
        at java.awt.Component.dispatchEvent(Component.java:3819)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)