Its got me. Have now setup MultiSite 4 times, reverting to saved image and starting again when things were not perfect.
Now I get the multi site dropdown, get network admin dashboard, can setup new sites, can change URL's, can visit site and get a 'hello world' page from a domain, I can add users to the site and they get emailed a password but cannot signon, nor can I signon as admin to any site to change pages. The signon page just flips back to blank, or guff about cookies not being enabled (which they are). I have obviously cleared cache, rebooted, tried different browsers. I can enter (sub) domain URL/wp-login.php and get signon screen but any login is ignored but returned with
I feel really beaten this time, one day someone will invent diagrams to describe WP architecture instead of text, text, text! Any one know please. Cheers, Richard UK