Hello,
Thank you for contacting the support, and sorry for any inconvenience that might have been caused due to that.
I was able to replicate the issue and I noticed your website is blocking access to a file which leads to a 403 error. It may have to do with your security plugin or server-related security software. https://rankmath.com/kb/meta-data-not-saving/#num-4-blocked-access-to-the-file
The file: /wp-json/rankmath/v1/updateMeta?_locale=user
[Refer screenshot in the Sensitive Data section]
Could you please contact your hosting provider and see if they are able to whitelist this file if possible?
If the issue persists, let us know and we will further investigate this with our dev team.
We are 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.