java.lang.IllegalArgumentException: Called DataObject.find on null
   at org.openide.loaders.DataObject.find(DataObject.java:608)
   at org.netbeans.modules.web.jsf.icefaces.Icefaces2Implementation.updateIndexPage(Icefaces2Implementation.java:231)
   at org.netbeans.modules.web.jsf.icefaces.Icefaces2Implementation.generateWelcomePage(Icefaces2Implementation.java:224)
   at org.netbeans.modules.web.jsf.icefaces.Icefaces2Implementation.extend(Icefaces2Implementation.java:153)
   at org.netbeans.modules.web.jsf.wizards.JSFConfigurationPanel.save(JSFConfigurationPanel.java:394)
   at org.netbeans.modules.maven.j2ee.ui.customizer.impl.CustomizerFrameworks.saveExistingExtenders(CustomizerFrameworks.java:564)
   at org.netbeans.modules.maven.j2ee.ui.customizer.impl.CustomizerFrameworks.access$800(CustomizerFrameworks.java:95)
   at org.netbeans.modules.maven.j2ee.ui.customizer.impl.CustomizerFrameworks$7$1.call(CustomizerFrameworks.java:528)
   at org.netbeans.modules.maven.j2ee.ui.customizer.impl.CustomizerFrameworks$7$1.call(CustomizerFrameworks.java:524)
Caused: java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Called DataObject.find on null
   at java.util.concurrent.FutureTask.report(FutureTask.java:122)
   at java.util.concurrent.FutureTask.get(FutureTask.java:192)
   at org.netbeans.modules.maven.j2ee.ui.customizer.impl.CustomizerFrameworks$7$2.run(CustomizerFrameworks.java:548)
   at org.netbeans.api.progress.BaseProgressUtils$RunnableWrapper.run(BaseProgressUtils.java:299)
   at org.netbeans.api.progress.BaseProgressUtils$RunnableWrapper.run(BaseProgressUtils.java:291)
   at org.netbeans.modules.progress.ui.RunOffEDTImpl$ProgressBackgroundRunner.runBackground(RunOffEDTImpl.java:488)
   at org.netbeans.modules.progress.ui.AbstractWindowRunner.call(AbstractWindowRunner.java:108)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)