This means Cloudflare can’t complete the SSL handshake with your server. Pause Cloudflare, or set the DNS record to DNS only, then requests will go direct to your origin and you can see the problem. Once fixed, you can re-enable Cloudflare again.
You’ll have to wait, or check with Google, for the SSL on your site to start working.
Usually sites that point to ghs.googlehosted.com are best left as “DNS only” for SSL certificate generation and so Google can confirm the domain resolves correctly to their CNAME.
It is a first-level subdomain of your domain, so is covered by the Universal SSL certificate (which covers soran.edu.iq and *.soran.edu.iq). An Advanced Certificate is not needed for it.