Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Container" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\dependency-injection\ContainerBuilder.php:57 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\dependency-injection\ContainerBuilder.php on line 57