Follow the below path in your WordPress admin panel wp-admin.
Appearance > DooPlay License
In the text field add your license key and then click on "Save Changes", if everything went correctly, a thank you message appears.
License activated, thanks.
There are common problems with the activation of any type of license in WordPress, remember that this function makes a request to a remote service, it ensures that your server can make requests via cURL.
If you have a firewall that blocks any request or remote action from your server, there is the possibility of forcing the activation of the license without any practical effect, follow the following path in your WP-ADMIN.
Tools > DooPlay Database
Click on "Activate License"
Upon completing this action, your license will have been activated but without any practical effect, we will not be able to notify you of new updates, so you should always consult them on our website.