Some of the selected domains or aliases were not activated.Unable to activate the domain: Either the domain owner or their subscription is suspended.

Issue occurs when administrator suspend domain. Cause due to renewal date.

Fix you can try.

Open RDP and run following command.

plesk bin site –on example.com replace example.com with your domain.

Next check domain over usage is causing the issues. You can get it details on plesk subscription panel. Try enabling the overusage allow option. And save the settings. Try activating domain now.

Still fails then check the service plan expiration date. In right side panel you will find the service plan tab. Click on it to edit it. Scroll down and look for expiration date. Change it to new one. And update the plan and then try again to activate the domain.