Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\security-bundle\DependencyInjection\SecurityExtension.php:71 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\security-bundle\DependencyInjection\SecurityExtension.php on line 71