Just a little snippet today! Should you run into the situation that a Drupal 7 CMS Website is broken and you can't see errors, perhaps you're not able to log into the webserver administration panel, then the following snippet for your settings.php may be helpful:
// DEBUGGING: // !! DO NOT USE IN PRODUCTION !! error_reporting(E_ALL); ini_set('display_errors', TRUE); ini_set('display_startup_errors', TRUE); $conf['error_level'] = 2;
That will presumably show you the errors you need to see.
Please ensure to remove it after fixing the bug! It will expose a lot of error information.