Tried that. Still doesn't work. I don't have an error_log file yet, so I just added error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
at the beginning of the php code for the login page, and it seems to be an error with AppController. Here's what is reads:
Fatal error: Class 'AppController' not found in /home/kyandiip/public_html/login.php on line 8
Earlier I did another one of these error code things, and took a screenshot of what appeared: