Fatal error: Uncaught Error: Class "Symfony\Component\CssSelector\XPath\Extension\AbstractExtension" not found in /home/helpdatafirst/public_html/helpapp/vendor/symfony/css-selector/XPath/Extension/HtmlExtension.php:29 Stack trace: #0 {main} thrown in /home/helpdatafirst/public_html/helpapp/vendor/symfony/css-selector/XPath/Extension/HtmlExtension.php on line 29