It appears that your site’s URL has changed since you connected it to Rank Math

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.

For troubleshooting, please remove your website from your Rank Math account dashboard:
https://rankmath.com/my-account/websites/

After that, please add this filter to your site:

/**
 * Filter whether we need to check for URL mismatch or not.
 */
add_filter( 'rank_math/registration/do_url_check', '__return_false' );

And here’s a guide to adding the filter to your website:
https://rankmath.com/kb/wordpress-hooks-actions-filters/

Then, head over to your WordPress dashboard > Rank Math > Status & Tools > Database Tools > Remove Transients:

Once done, clear your website’s cache and try connecting it again.

Let us know how this goes.

Thank you.

Hello,

Thank you for getting back to us.

If you have tried the above filter my colleague shared and you are still experiencing the issue, then we might need to take a closer look at your website settings. Please edit the first post on this ticket and include your WordPress logins and the URL of an affected post in the designated Sensitive Data section.

Please 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.