I get an error : “Undefined index: level” in /var/www/html/web/app/plugins/s2member/src/includes/classes/constants.inc.php line 600
This reads
define ('S2MEMBER_CURRENT_USER_PAID_REGISTRATION_DAYS', ($c[] = (($user && (int)@$paid_registration_times['level']) ? (int)floor((strtotime('now') - (int)$paid_registration_times['level']) / 86400) : 0)));
This adds the php-error class to admin body which generates a redundant space between admin menu en admin bar.