Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Container" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\framework-bundle\Test\TestContainer.php:29 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\framework-bundle\Test\TestContainer.php on line 29