Your server responds with a 426 status code. Check your server and find out why it does that.
Also, you seem to be using the Flexible SSL mode. That’s not secure, you should install an SSL certificate on your server and use the Full (Strict) mode.
I tried many SSL modes, i am currently trying to make the site for HTTP only currently, that it will work partially, my server works completely fine while using other domain with DNS only.