Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
We’ve checked your site and found that the following REST Routes we use to update the data are being blocked by your Wordfence firewall.
/wp-json/rankmath/v1/updateMeta
/wp-json/rankmath/v1/updateSchemas
/wp-json/rankmath/v1/updateRedirection

Please try to whitelist these routes on the firewall and see if that helps you to resolve the issue: https://rankmath.com/kb/whitelist-rank-math-in-wordfence/
Let us know how it goes. Looking forward to helping you.
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.