How to add a Dashboard in the Learning Administrator Home

Summary

How to add a Dashboard in the Learning Administrator Home

Content

Hi,

I need to add a dashboard in the Learning Administrator Home Page (My Client Groups > Learning > Administrator Home).
I activated a sandbox and opened the Edit Page functionality, then clicked on "Select" and, in the menu on the right, Components > Box > Add, as I know that in order to add a report I have first to add a box. But I obtained the message shown in the screenshots: "There are no boxes on the page, so you cannot add any content. Make sure your page (or the template it was based upon) includes at least one box before attempting to add content."