Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for the delay and for any inconvenience this issue may have caused you.
Please head over to your Rank Math account here:
https://rankmath.com/my-account/websites/
Then check if you are able to see your remaining credits as shown in this screenshot:

If you still have credits remaining, please head over to your website’s dashboard > Rank Math > Dashboard > Help and on this page, please disconnect and reconnect your Rank Math account.
Also, we have added an icon above the Research Keyword field in the Content AI tab to get the credits left for the user’s account. Please update to the latest version of Rank Math plugin and you should see this option to refresh the credits

I hope that helps.
Thank 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.