Warning: require_once(class/helper.php): failed to open stream: No such file or directory in /var/www/eventkrake/www-prod/app/start.php on line 81

Fatal error: require_once(): Failed opening required 'class/helper.php' (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/eventkrake/www-prod/app/start.php on line 81