Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
Please check if you are using a Firewall, as it may prevent saving the changes.
If you are using a Firewall, please whitelist this route:
/wp-json/rankmath/v1/updateMeta
Whitelisting the route should fix the issue.
You can check this link for more information:
https://rankmath.com/kb/meta-data-not-saving/#firewall
If the issue persists, please add a focus keyword and share a screenshot of the error in the browser console after saving the page.
https://rankmath.com/kb/meta-data-not-saving/#num-2-1-how-to-check-javascript-errors-in-chrome
We look forward to helping you.
Anas,
I’m not using any firewall. And the odd part is it’s only happening to the one post. I can add a keyword to other posts and they save correctly. I can even create a new post and the rank math settings save correctly. And there is no error message to show you. I open the post, add a keyword, or add a social photo in Rank Math, hit “Update” and it appears to save. But when I go back to the post later, none of those settings are saved.
Brian
Hello,
In this case, 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.