The purchase code has already been activated

Just bought “Intense - Shortcodes and Site Builder for WordPress” and upon activating the licence I receive the following error " The purchase code has already been activated"

What can I do to correct this?

Hi @musiccitychironashvi,

Please contact the author of your purchased Item and let them know. The Item author will assist you.

How to contact an author to get support or for any technical query:

Thanks