Dashboards are activated by users assigned to an Administrator role.
To reactivate a Dashboard:
If you don't have an Analytics tab open, click on the Access button.
Select Products and then Analytics.
From the options on the left, select Dashboards.
Click on the eye next to the Dashboards and select Activate.
Activate all Dashboards.
Close the Analytics tab.
Click on the Access button again.
Select Products and then Analytics. The Dashboard should no longer be in Preview mode.