Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Loader\LoaderInterface' not found in /mnt/volume_lon1_01/backend/admin/vendor/symfony/routing/Loader/AnnotationClassLoader.php:57 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/symfony/routing/Loader/AnnotationClassLoader.php on line 57