Fatal error: Uncaught Error: Class "Symfony\Component\CssSelector\Node\AbstractNode" not found in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/css-selector/Node/FunctionNode.php:26 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/symfony/css-selector/Node/FunctionNode.php on line 26