MultiSite can't 'add new site

After setting up multisite including editing the confige.php and .htaccess files. When I try to add a new site, I get site added notification at top of page, then can't access dashboard or site. I Get: This site can’t be reached’s server DNS address could not be found.

I have tried this on 2 different domains on the same Bluehost account. First with the sub domain; and then with the main domain;
Dedicated IP , Shared Hosting