Fatal error: Uncaught Error: Class "Symfony\Component\Config\Loader\FileLoader" not found in /home/appdemo/public_html/samena-mailer/vendor/symfony/routing/Loader/AttributeFileLoader.php:26 Stack trace: #0 {main} thrown in /home/appdemo/public_html/samena-mailer/vendor/symfony/routing/Loader/AttributeFileLoader.php on line 26