KREST2 nodes throw NullPointerException

All the Krest2 nodes throw a NullPointerException upon Configure (see below).  Any ideas?

Krest1 nodes are OK.  I am using

  REST Client    2.0.0.v201511201309    com.cenix.krest2.nodes.feature.feature.group    AABerger

with

    Eclipse SDK    4.5.0.I20150603-2000

java.lang.NullPointerException
    at com.cenix.krest2.settings.authentication.AuthenticationSettingsGroup$2.forceRepaint(AuthenticationSettingsGroup.java:543)
    at com.cenix.krest2.settings.authentication.AuthenticationSettingsGroup$2.ancestorAdded(AuthenticationSettingsGroup.java:560)
    at javax.swing.AncestorNotifier.fireAncestorAdded(AncestorNotifier.java:86)
    at javax.swing.AncestorNotifier.propertyChange(AncestorNotifier.java:223)
    at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
    at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
    at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
    at java.awt.Component.firePropertyChange(Component.java:8430)
    at javax.swing.JComponent.addNotify(JComponent.java:4741)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at java.awt.Panel.addNotify(Panel.java:87)
    at java.awt.Container.addNotify(Container.java:2773)
    at java.awt.ScrollPane.addNotify(ScrollPane.java:561)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at javax.swing.JComponent.addNotify(JComponent.java:4740)
    at java.awt.Container.addNotify(Container.java:2773)
    at java.awt.Panel.addNotify(Panel.java:87)
    at java.awt.Container.addImpl(Container.java:1121)
    at java.awt.Container.add(Container.java:417)
    at org.knime.workbench.ui.wrapper.Panel2CompositeWrapper.<init>(Panel2CompositeWrapper.java:105)
    at org.knime.workbench.ui.wrapper.WrappedNodeDialog.createDialogArea(WrappedNodeDialog.java:269)
    at org.eclipse.jface.dialogs.Dialog.createContents(Dialog.java:768)
    at org.eclipse.jface.window.Window.create(Window.java:430)
    at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1096)
    at org.knime.workbench.ui.wrapper.WrappedNodeDialog.create(WrappedNodeDialog.java:285)
    at org.eclipse.jface.window.Window.open(Window.java:792)
    at org.knime.workbench.ui.wrapper.WrappedNodeDialog.open(WrappedNodeDialog.java:164)
    at org.knime.workbench.editor2.editparts.NodeContainerEditPart.openNodeDialog(NodeContainerEditPart.java:817)
    at org.knime.workbench.editor2.actions.OpenDialogAction.runOnNodes(OpenDialogAction.java:129)
    at org.knime.workbench.editor2.actions.AbstractNodeAction.runInSWT(AbstractNodeAction.java:156)
    at org.knime.workbench.editor2.actions.AbstractNodeAction$1.run(AbstractNodeAction.java:142)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:186)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:145)
    at org.eclipse.swt.widgets.Display.syncExec(Display.java:4761)
    at org.knime.workbench.editor2.actions.AbstractNodeAction.run(AbstractNodeAction.java:139)
    at org.eclipse.jface.action.Action.runWithEvent(Action.java:473)
    at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:595)
    at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:511)
    at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:420)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4180)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3769)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1515)

(I would give a try to the new REST nodes in KNIME 3.2 from the Labs.) Sorry, I do not know why that happens.