Fatal error: Uncaught Error: Class "Symfony\Component\CssSelector\Node\AbstractNode" not found in /home/ldt/public_html/canvas/udoit/vendor/symfony/css-selector/Node/ElementNode.php:24 Stack trace: #0 {main} thrown in /home/ldt/public_html/canvas/udoit/vendor/symfony/css-selector/Node/ElementNode.php on line 24