Hello,
We tested the website with our external SEO Analyzer and are getting the ‘Invalid server response’
You can ask your hosting provider to whitelist the IP 46.30.211.100 and the user-agent RankMathApi/2.0.7; https://rankmath.com and see if that works for you.
Also, please make sure they are not blocking any Rank Math Rest APIs: https://rankmath.com/kb/whitelist-rank-math-in-cloudflare/
And you should whitelist the same IP if you are using Cloudflare.
If it persists, please check with your host and share your server & site’s IP addresses so we can check if your site is getting blocked from our end.
Don’t hesitate to get in touch if you have any other questions.
