java.lang.NullPointerException: The fo parameter cannot be null
   at org.openide.util.Parameters.notNull(Parameters.java:89)
   at org.netbeans.modules.j2ee.dd.api.web.DDProvider.getDDRoot(DDProvider.java:111)
   at org.netbeans.modules.j2ee.dd.api.web.DDProvider.getDDRootCopy(DDProvider.java:213)
   at org.netbeans.modules.web.wicket.framework.WicketFrameworkProvider$CreateWicketFiles.run(WicketFrameworkProvider.java:443)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:607)
   at org.netbeans.modules.web.wicket.framework.WicketFrameworkProvider.extendImpl(WicketFrameworkProvider.java:116)
   at org.netbeans.modules.web.wicket.framework.WicketWebModuleExtender.extend(WicketWebModuleExtender.java:177)
   at org.netbeans.modules.maven.j2ee.customizer.CustomizerFrameworks$4$1.run(CustomizerFrameworks.java:443)
   at org.netbeans.api.progress.ProgressUtils$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$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
Caused: java.util.concurrent.ExecutionException: java.lang.NullPointerException: The fo parameter cannot be null
   at java.util.concurrent.FutureTask$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.maven.j2ee.customizer.CustomizerFrameworks$4.run(CustomizerFrameworks.java:438)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)