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 Rank Math REST Routes that we use to update the data are being blocked by your Wordfence firewall and most likely this is why you’re facing the issue.

In order to resolve this issue, please try whitelisting the following Rank Math REST Routes that are being blocked on your firewall.
/wp-json/rankmath/v1/updateMeta
/wp-json/rankmath/v1/updateSchemas
/wp-json/rankmath/v1/updateRedirection
You may try following this link to learn how you can whitelist Rank Math REST Routes in Wordfence Firewall: https://rankmath.com/kb/whitelist-rank-math-in-wordfence/
Hope that helps and please don’t hesitate to let us know if you have any other questions.
Thank you.
Hello! Thank you for providing me the solution that I was stuck for so long!
With the screenshot below, it should be okay right?
https://imgur.com/a/wJaEZHi
Hello,
We’ve checked your website and we can confirm the Rank Math Rest APIs are not getting blocked anymore.

Can you please confirm if you’re now able to save the meta data on your website?
Looking forward to hearing back from you.
Thank you.
Morning!
Yes! From our side, we can edit the meta now!
So basically I will just have to let Wordfence to learn again, so it will not blocked by it right?
Thank you so much for providing help for me!
Hello,
Thank you for the update.
Yes, you can set it to learning mode or whitelist the Rank Math routes from the guide we shared above.
Looking forward to helping you.
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.