The admin and pro versions of our products are limited to the number of domains you can have in your Plesk panel. If you get this error then it means that you are going over your domain limit. To fix the error you can cancel your current license though our client area then order the 30 domain or unlimited domain licenses. After your order is approved you will get a new license key that you can enter in the license area of the product.
What domains are counted for a Danami license domain limit?
How do the admin and pro edition domain limits work?
How can I upgrade my license from the admin or host editions?