Hello,
Thanks for contacting us, and sorry for any inconvenience that might have been caused due to that.
I tried checking for the Rank Math REST routes on your site if they are being blocked and yes, I found the Rank Math REST routes are being blocked by Wordfence installed on your site. Here’s a screenshot below for your reference.

/wp-json/rankmath/v1/updateMeta
/wp-json/rankmath/v1/updateSchemas
/wp-json/rankmath/v1/updateRedirection
In order to fix this issue, please whitelist the above-mentioned Rank Math REST Routes by following the guide below:
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.