WARNING: At this time, Dashboard and Widget JSON files are not interchangeable between application dashboards, meaning AssetView json files may only be used in AssetView and Vulnerability Management json files may only be used in Vulnerability Management. If you make a mistake and import a json file from one application into the other, you must contact Qualys Support to have the error corrected in the database for your subscritpion. Again, there is no way to reverse this mistake within the UI, it must be done in the database.
TIP: If the import doesn't populate automatically, try pressing CNTL+F5 to refresh the screen. A CNTL+F5 forces a cache refresh and will guarantee that if the content is changed, you will get the new content.