Woohoo!
After hours of searching, I found the solution: removing the spaces (extra lines) in my theme’s function.php. what a headache for that.
Any ideas out there?
I cannot log into (or out) of my site unless I revert back to the default the theme. The theme is using wp_loginout() same as in the default. Whether I use the link or type in …/wp-login.php I get the log in page, but it just goes to a blank page once I try to log in. Blank page on log out too.
But now I cannot access the dashboard at all to revert back to the default theme. Driving me nuts.