Hi, i have the same issue, i just update to wordpress 4.7 and sunrain 1.7, when i logged to the dashboard i can see the site, but if logout the site just show a blank screen, if i go the f12 developer tools and then network in the borwser, even view source code, i can see all the stuff loaded, but the browser only shows a blank screen.
deactivate plugings not help, reinstall the theme neither.