Error 525 SSL handshake failed - Google Site

I have setup 1 Google sites

I use Cloudflare as DNS for the following domains

I have setup custom domain at Google site. Please refer to my attachment

For Cloudflare DNS, I have setup CNAME, with value “ghs.googlehosted.com

However, I’m getting Error 525 SSL handshake failed for both sites

Any idea how I can resolve the problem?

In Cloudflare SSL settings, I have tried to change from “Full” to “Flexible”. However, that will end up with infinity redirection - ERR_TOO_MANY_REDIRECTS

You need to make sure you have a valid certificate configured on Google.