DisplacedHoser

I found the answer! Hopefully this will help others.

This guy noted a simple fix: https://kaspars.net/blog/wordpress/wordpress-multisite-without-domain-mapping

Go into wp-config.php and just add this line: define(‘COOKIE_DOMAIN’, ”);

And that fixes the problem.

Thank you! They fixed it.

Thanks for the reply and sorry for the delay.

So, I went into cpanel and created a wildcard subdomain for *.domainname.com … and nothing changed, it still doesn’t work. I go to whatsmydns.net and they do not have the same IP – the subdomains propagate only in Pasadena and nowhere else, with a different address than the main domain – even though I set up wildcard subdomains. Help!

It’s generic: “Oops! Google Chrome could not find testsite.domainname.com”

Thanks. The basic database problems are fixed. The diacritics still aren’t working, though. Deleting (or commenting out) DB_COLLATE and DB_CHARSET doesn’t fix anything, though; it actually makes it worse. When I do that, even standard French and German diacritics (like é) don’t work (they get replaced by a “?” inside an opaque diamond shape), in addition to my usual problem that more obscure Sanskrit diacritics (like ā) get replaced by a ? character. A friend suggested “make sure your MySQL tables use Unicode to encode their data.” How do I do that?