Okay, I'm not sure if I'm on 3.8.3 or 3.9 for this site, because I use Softaculous to install and keep up to date, but I have manually updated some of my installations and I don't remember if this is one of them. I have FTP access, of course; how can I tell what version I'm running via FTP? I've looked at the contents of wp-settings, for example, and can't tell.
After the upgrade to whichever version, I can't log in. Whenever I go to /login/ or /wp-admin/, I get "Error: No username given." and the URL in the browser is:
http://site/login/?redirect_to=http://site/wp-admin/&reauth=1
(where "[site]" is my domain)
Any ideas on what to try? The site itself looks like it's running okay, I just can't get to the dashboard. :(
