java.lang.IllegalStateException: Dialog was not created correctly
   at org.netbeans.modules.uihandler.Installer$SubmitInteractive.createDialog(Installer.java:1991)
   at org.netbeans.modules.uihandler.Installer$Submit.run(Installer.java:1600)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1957)