java.lang.ClassCastException: org.netbeans.modules.xml.XMLDataObject cannot be cast to org.netbeans.modules.portalpack.portlets.genericportlets.node.ddloaders.PortletXMLDataObject
   at org.netbeans.modules.portalpack.portlets.genericportlets.core.codegen.WebDescriptorGenerator.addNewPortletEntry(WebDescriptorGenerator.java:187)
   at org.netbeans.modules.portalpack.portlets.genericportlets.core.metagen.WebResourceCreatorFactory.addPortletEntryToPortletXml(WebResourceCreatorFactory.java:39)
   at org.netbeans.modules.portalpack.portlets.genericportlets.core.component.NewPortletCreateComponent.doAfterCreate(NewPortletCreateComponent.java:73)
   at org.netbeans.modules.portalpack.portlets.genericportlets.core.component.NewPortletCreateComponent.doCreateClass(NewPortletCreateComponent.java:94)
   at org.netbeans.modules.portalpack.portlets.genericportlets.frameworks.util.PortletFrameworkUtil.createPkgAndClass(PortletFrameworkUtil.java:70)
   at org.netbeans.modules.portalpack.portlets.genericportlets.frameworks.jsr168.JSR168WebFrameworkProvider.extendImpl(JSR168WebFrameworkProvider.java:132)
   at org.netbeans.modules.portalpack.portlets.genericportlets.frameworks.jsr168.PortletApplicationWizardPanel.extend(PortletApplicationWizardPanel.java:119)
   at org.netbeans.modules.web.project.ui.customizer.WebProjectProperties$8$1.run(WebProjectProperties.java:1048)
   at org.netbeans.api.progress.ProgressUtils$RunnableWrapper.run(ProgressUtils.java:327)
   at org.netbeans.api.progress.ProgressUtils$RunnableWrapper.run(ProgressUtils.java:319)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl$ProgressBackgroundRunner.runBackground(RunOffEDTImpl.java:458)
   at org.netbeans.modules.progress.ui.AbstractWindowRunner.call(AbstractWindowRunner.java:108)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
Caused: java.util.concurrent.ExecutionException: java.lang.ClassCastException: org.netbeans.modules.xml.XMLDataObject cannot be cast to org.netbeans.modules.portalpack.portlets.genericportlets.node.ddloaders.PortletXMLDataObject
   at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
   at java.util.concurrent.FutureTask.get(FutureTask.java:111)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl.showProgressDialogAndRun(RunOffEDTImpl.java:353)
   at org.netbeans.api.progress.ProgressUtils.showProgressDialogAndRun(ProgressUtils.java:247)
   at org.netbeans.api.progress.ProgressUtils.showProgressDialogAndRun(ProgressUtils.java:285)
   at org.netbeans.modules.web.project.ui.customizer.WebProjectProperties$8.run(WebProjectProperties.java:1043)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2044)