Fatal error: Uncaught Error: Class 'Symfony\Component\ErrorHandler\Error\FatalError' not found in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/symfony/error-handler/Error/OutOfMemoryError.php:14 Stack trace: #0 {main} thrown in /home/edmedu/www/hana-edu.co.kr/sf4l/vendor/symfony/error-handler/Error/OutOfMemoryError.php on line 14