Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Loader\FileLoader' not found in /mnt/volume_lon1_01/backend/admin/vendor/symfony/routing/Loader/XmlFileLoader.php:28
Stack trace:
#0 {main}
thrown in /mnt/volume_lon1_01/backend/admin/vendor/symfony/routing/Loader/XmlFileLoader.php on line 28