I see this message in the page of the extension: The license has been installed. To increase the amount of available resources, click "Upgrade" to buy either more licenses or a different license, depending on the extension.
In my Windows installation I can see only the English Language pack, there is no other option.
If I remember well all the languages pack are available for default.
I have no idea how to solve the problem.
Because when I move domains between different servers or to upgrade a server I must change the primary dns in the registrar panel everytime. With thousands of domains and ten server it's time consuming and can't be automated.
I have one Plesk server and two debian10 Slave DNS (pns1 and pns2) . I want to mantain the same DNS config even if I move domains on another Plesk server, but I'd like to mantain Plesk Panel to configure zones for the customers.
So I configured some zones only with external slave DNS as NS...