Fatal error: Uncaught Error: Class 'Symfony\Component\CssSelector\Node\AbstractNode' not found in /mnt/volume_lon1_01/backend/admin/vendor/symfony/css-selector/Node/ElementNode.php:24 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/symfony/css-selector/Node/ElementNode.php on line 24