Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
Please check if you are using a Firewall, as there are chances that it will prevent saving the data.
If you are using a Firewall, please whitelist this route:
/wp-json/rankmath/v1/updateMeta
You can check this link for more information:
https://rankmath.com/kb/meta-data-not-saving/#firewall
I hope that helps.
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.