java.lang.NullPointerException
   at org.netbeans.modules.web.wicket.verification.WicketProblemAnnotationProvider.annotate(WicketProblemAnnotationProvider.java:74)
   at org.openide.text.CloneableEditorSupport.ensureAnnotationsLoaded(CloneableEditorSupport.java:417)
   at org.openide.text.CloneableEditor$DoInitialize$3.run(CloneableEditor.java:846)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
   at org.openide.text.CloneableEditor$DoInitialize.initRest(CloneableEditor.java:844)
   at org.openide.text.CloneableEditor$DoInitialize.run(CloneableEditor.java:400)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1973)