Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
You should able to connect your Rank Math account from WP Dashboard > Rank Math > Dashboard > Help: https://rankmath.com/kb/how-to-connect-or-disconnect-rank-math/#connect-a-site
If you still face any error while connecting your account, please share a screenshot with us by using any image-sharing tool like https://imgur.com/upload so that we can check this further for you.
Let us know how it goes. Looking 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.