I troubleshot it using the “health Check” tool you recommend, went into troubleshooting mode – disbaled all other plugins, enabled only rank math and tried to edit the post on the default twenty-twenty theme. And it still had an error.
The moment I deactivate your plugin, everything works.
I am on WordPress version 5.6.11 and PHP 7.4.33
Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
We might need to take a closer look at the settings. Please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.
Please do take a complete backup of your website before sharing the information with us.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
Looking forward to helping you.
Thank you.
Hello,
I have updated the sensitive data as requested. Can you please check further?
Thank you.
Hello,
Thank you for reaching out to Rank Math support. I apologize for the inconvenience caused by the issue with saving your Rank Math details.
I have checked your site and I found out that the problem is caused by WordFence, a security plugin that is blocking the REST route that Rank Math uses to save your settings. You can confirm this by going to this URL in your browser:
https://yourdomain.com/wp-json/rankmath/v1/updateMeta
If you see a message like
{"code":"rest_no_route","message":"No route was found matching the URL and request method","data":{"status":404}}
then your REST route is working fine. But if you see a message that says your access has been blocked by a firewall, then you need to whitelist Rank Math and its files in your WordFence settings. This will allow Rank Math to communicate with your site and save your settings properly.
Don’t worry, this is not a difficult process and we have a detailed guide on how to do it here:
https://rankmath.com/kb/whitelist-rank-math-in-wordfence/
Please follow the steps in the guide and see if that fixes the issue. If not, please let me know and I will be happy to assist you further.
Thank you for using Rank Math.
Hello,
I followed the instructions but i am still having issues when trying to edit a post.
see below video.
https://www.awesomescreenshot.com/video/18411003?key=8d26137b63dcc252255a66fa1f27e292
Hello,
Thank you for your patience.
It looks like the issue is occurring due to the old version of WordPress you’re using.
It’s recommended to update to the latest version of WordPress due to security and various reasons. Please update to the latest version of WordPress to fix this one.
Note: Make sure to take a complete backup of your site before applying such major changes / try applying changes to the staging site first.
After that update all of your themes and plugins to see if that works for you now.
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.