java.lang.IllegalArgumentException: Called DataObject.find on null
        at org.openide.loaders.DataObject.find(DataObject.java:481)
        at org.netbeans.modules.ide.ergonomics.ImportProjectAction.performRegular(ImportProjectAction.java:90)
        at org.netbeans.modules.ide.ergonomics.ImportProjectAction.access$000(ImportProjectAction.java:62)
        at org.netbeans.modules.ide.ergonomics.ImportProjectAction$1.run(ImportProjectAction.java:78)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:602)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1070)