Hello,
Thank you for contacting the support and we regret the inconvenience caused.
Could you confirm if you’re using a firewall? If yes, please whitelist this route and see if that fixes the issue: /wp-json/rankmath/v1/updateMeta
If the issue persists, please follow this guide and see if that helps:
https://rankmath.com/kb/meta-data-not-saving/
Let us know how that goes.
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.