Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
It seems that you’re installing the Rank Math PRO plugin but the account you have used to open this ticket is the Rank Math free version.
Can you please search and forward a receipt from FastSpring.com or the email address you used to purchase so we can locate your account and verify it?
Meanwhile, you will need both of them to be installed and activated at the same time so the PRO version will work:
https://rankmath.com/kb/should-i-delete-free-plugin-after-upgrading/
Looking forward to helping you.
Thank you.
Non ho capito dove devo fare richiesta
Another thing i buy content IA not pro. Dont know if it’s different. But It Said tò me that if i want to put on WordPress it’s compulsory delete free version
Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to this issue.
If you meant, you purchased ContentAI and not Rank Math PRO, then there should not be any issue. ContentAI works both on the free and paid versions of the Rank Math SEO plugin. You need not delete it, but kindly ensure you are using the latest version of our plugin: https://rankmath.com/changelog/free/
Please confirm that you can see your remaining credits from WP Admin > Rank Math > Content AI… See the illustration below:

If the new credits are not appearing on your website then you might need to refresh the credits to start using Content AI.
Please head over to WordPress Dashboard → Rank Math → General Settings → Content AI and refresh the credits. Here’s a screenshot for reference:

Once done, please go back to using Content AI and it should work without any issues.
To confirm the correct number of credits your site should show kindly go to: https://rankmath.com/my-account/websites/ and see the remaining balance under the Connected Websites heading:
Your balance is the difference between the figure on the right and that on the left.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Thank you.
Hello again,
We are glad to know that this issue has been resolved. Thank you for letting us know.
This ticket will be closed now, but you can always open a new one if you have any other questions or concerns. We are here to help you with anything related to Rank Math.
We appreciate your patience and cooperation throughout this process.
Thank you for choosing Rank Math.