I have a question about the license. I entered the license on the customer website. However, the website does not appear on the AcyMailing license page. What do I have to do to activate the license?
You need to enter your license key in the Acymailing config: https://docs.acymailing.com/setup/configuration/license
I entered the license number. I clicked the "Attached my license" button. But the URL is not entered on the AcyMailing website.
The system displays the message "This website does not have a valid license".
I would suggest you to please raise a support ticket via Acyba's website: https://www.acymailing.com/contact/