Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in /home/appvanshi/public_html/admin_panel/vendor/sensio/framework-extra-bundle/DependencyInjection/SensioFrameworkExtraExtension.php:25 Stack trace: #0 {main} thrown in /home/appvanshi/public_html/admin_panel/vendor/sensio/framework-extra-bundle/DependencyInjection/SensioFrameworkExtraExtension.php on line 25