Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\sensio\framework-extra-bundle\src\DependencyInjection\SensioFrameworkExtraExtension.php:28 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\sensio\framework-extra-bundle\src\DependencyInjection\SensioFrameworkExtraExtension.php on line 28