Domain Mapping 4.1.1
Multi Domains 1.3.1
Pro Sites 3.4.1
First of all, it's imperative that Domain Mapping works, so I am using DM's sunrise.php.
Second, I have 6 domains tied to Multi-Domains on the WPMU install. The main domain is set to private, so user's cannot create sites on that domain. The other 5 domains are public.
My superadmin created 2 sub sites on a public domain. I can view the sites, but I cannot log into them. I get this error:
ERROR: Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress.
I looked at the cookies on the browser, and indeed it's not creating cookies even when I visit the sub sites. My browser only has cookies for the main site where I logged in as Superadmin.
This is the same behavior whether Single Signon is ON or OFF.
I've toggled these wp-config.php settings (comment, uncomment), but I still cannot log in.
This WPMU install is on the ROOT folder of the IP. All of my domains are pointing to the root folder, including their wildcard subdomains.
I think I've tried everything, but still not working.