Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\dependency-injection\ParameterBag\ContainerBag.php:19 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\dependency-injection\ParameterBag\ContainerBag.php on line 19