Multisite not working on a vanilla install of WP

HI there,

I have a vanilla install of WP here:

I have installed only the following plugins - all of which are WPMU Dev plugins:
WPMU DEV Dashboard
Domain Mapping
Pro Sites

My .htaccess file looks has this added:

define( 'WP_ALLOW_MULTISITE', true );

define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', true);
define('DOMAIN_CURRENT_SITE', '');
define('PATH_CURRENT_SITE', '/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);

define('SUNRISE', 'on');


My .htaccess file looks like this:

# BEGIN WordPress

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

# END WordPress


I've moved sunrise.php to wp-content/

I cannot however visit any site that I'm creating as multisite. If I create new site and visit it I get a browser error. For example in Chrome I see:

This site can’t be reached’s server DNS address could not be found.
Reloading the page
Checking the connection
Checking the proxy, firewall, and DNS configuration


Please could you offer some support as to why this might be happening.


BTW - the domain was registered about 3 hours ago, but I can visit the 'main' site so I know that the DNS is propagated properly.

I have enabled support access to the site also.