Alright, I figured out the problem for my case.
Turns out my Redirection plugin started screwing up by forwarding everything after example.com/content folder/ like example.com/content folder/admin to example.comadmin without the slash. Maybe the Better WP Security had something to do with it, or maybe not… but I just snuck into the FTP renamed the Redirection plugin folder name, and voila… once the cookies cleared, I get access again to the login page.
If that’s not the problem, people have told me to just get into your .htaccess file and adjust the #better wp plugin section and/or rename plugin folder name.
Good luck everyone
