Hello,
Thank you for reaching out to us. We’re sorry to hear that you’re facing issues accessing Content AI after purchasing it.
To set up Content AI, please follow these steps:
- Head over to your WordPress Dashboard.
- Navigate to Rank Math > General Settings > Content AI.
- Refresh the credits by clicking on the “Refresh Credits” button.
Here’s a screenshot for reference:

After refreshing the credits, you should be able to access and use Content AI without any issues. If you encounter any further difficulties, please don’t hesitate to let us know.
We’re here to help!
Sources:
How to Use Content AI in Block Editor » Rank Math
Content AI Overview » Rank Math
there is no ‘general settings’ tab
Hello,
Thank you for your query and we are so sorry about the trouble this must have caused.
You can see the general settings under WordPress Dashboard > Rank Math Menu
As been in this screenshot: 
If don’t see the settings, we might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.
Please do take a complete backup of your website before sharing the information with us.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
We really look forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.