HALE Java Exception

java.lang.NullPointerException
	at net.sf.hale.editor.NewAreaPopup.<init>(NewAreaPopup.java:66)
	at net.sf.hale.editor.widgets.MenuAreaSelector$1.run(MenuAreaSelector.java:48)
	at de.matthiasmann.twl.utils.CallbackSupport.fireCallbacks(CallbackSupport.java:100)
	at de.matthiasmann.twl.model.SimpleButtonModel.fireActionCallback(SimpleButtonModel.java:124)
	at de.matthiasmann.twl.model.SimpleButtonModel.buttonAction(SimpleButtonModel.java:108)
	at de.matthiasmann.twl.model.SimpleButtonModel.setPressed(SimpleButtonModel.java:81)
	at de.matthiasmann.twl.Button.handleEvent(Button.java:285)
	at de.matthiasmann.twl.GUI.sendMouseEvent(GUI.java:1017)
	at de.matthiasmann.twl.GUI.handleMouse(GUI.java:801)
	at de.matthiasmann.twl.input.lwjgl.LWJGLInput.pollInput(LWJGLInput.java:65)
	at de.matthiasmann.twl.GUI.handleInput(GUI.java:674)
	at de.matthiasmann.twl.GUI.update(GUI.java:558)
	at net.sf.hale.editor.CampaignEditor.mainLoop(CampaignEditor.java:241)
	at net.sf.hale.Game.runGameEditor(Game.java:395)
	at net.sf.hale.Game.performAction(Game.java:346)
	at net.sf.hale.Game.main(Game.java:284)