Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
Please get in touch with your host and make sure the IP 193.138.6.5
and the user-agent RankMathApi/2.0.2;
https://rankmath.com
are whitelisted on your firewall.
Once done, please head over to your WordPress Dashboard > Rank Math > Status & Tools > Database Tools and click the Clear SEO Analysis
and Remove Transients
buttons to flush the SEO Analysis cache.
Please clear your website and any server-level caching on your site before doing the SEO analysis again.
For more details on this issue, please check this URL: https://rankmath.com/kb/api-http-400-error/
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.