Fatal error: Uncaught Error: Class 'Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag' not found in /mnt/volume_lon1_01/backend/admin/vendor/symfony/http-foundation/Session/Attribute/NamespacedAttributeBag.php:20
Stack trace:
#0 {main}
thrown in /mnt/volume_lon1_01/backend/admin/vendor/symfony/http-foundation/Session/Attribute/NamespacedAttributeBag.php on line 20