"Your current license does not include the use of the EA Designer."
The Dashboard Server license currently being used is not a product edition that includes use of the Enterprise Application (EA) Designer.
Enterprise Application Monitoring (EAM) features are available with the Enterprise Application Monitoring (EAM) edition. To upgrade please contact firstname.lastname@example.org.
For more information about Enterprise Applications (EAs) see Enterprise Applications.
If you have recently upgraded your license you may need to reactivate the license for Dashboard Server to pick up the recently added features. See How to reactivate your license.