Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Definition" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\dependency-injection\ChildDefinition.php:22 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\dependency-injection\ChildDefinition.php on line 22