java.lang.AssertionError: Must be called on event thread
   at org.netbeans.validation.api.ui.SwingValidationListenerFactories.createJTextComponentValidationListener(SwingValidationListenerFactories.java:169)
   at org.netbeans.validation.api.ui.ValidationListenerFactory.findBuiltInValidationListener(ValidationListenerFactory.java:163)
   at org.netbeans.validation.api.ui.ValidationListenerFactory.createValidationListener(ValidationListenerFactory.java:125)
   at org.netbeans.validation.api.ui.ValidationGroup.add(ValidationGroup.java:232)
   at org.netbeans.modules.maven.apisupport.NbmWizardPanelVisual.<init>(NbmWizardPanelVisual.java:108)
   at org.netbeans.modules.maven.apisupport.NbmWizardPanel.getComponent(NbmWizardPanel.java:87)
   at org.netbeans.modules.maven.apisupport.NbmWizardIterator.initialize(NbmWizardIterator.java:227)
   at org.netbeans.modules.ide.ergonomics.newproject.DescriptionStep.waitForDelegateWizard(DescriptionStep.java:314)
   at org.netbeans.modules.ide.ergonomics.newproject.DescriptionStep.access$000(DescriptionStep.java:93)
   at org.netbeans.modules.ide.ergonomics.newproject.DescriptionStep$PresentModules.presentModulesForActivation(DescriptionStep.java:192)
   at org.netbeans.modules.ide.ergonomics.newproject.DescriptionStep$PresentModules.taskFinished(DescriptionStep.java:171)
   at org.netbeans.modules.ide.ergonomics.fod.FindComponentModules$1.taskFinished(FindComponentModules.java:121)
   at org.openide.util.Task.notifyFinished(Task.java:240)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1449)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)