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)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.IllegalStateException: Dialog was not created correctly
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
   at org.netbeans.modules.uihandler.Installer$Submit.doShow(Installer.java:1471)
   at org.netbeans.modules.uihandler.Installer.displaySummary(Installer.java:943)
   at org.netbeans.modules.uihandler.Installer.displaySummary(Installer.java:952)
   at org.netbeans.modules.uihandler.UIHandler.run(UIHandler.java:160)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)