That shows "Assessment failed: Unable to connect to the server" right now.
The checkhost service makes a connection to your site to see what certificate you're using, and apparently it's timing out.
For me, accessing http://www.studiosh2o.com/ works (it returns a redirect to HTTPS) but accessing https://www.studiosh2o.com/ times out.
Maybe there's a firewall blocking port 443 to your website?