Fatal error: Uncaught Error: Class "Symfony\Component\Config\Definition\VariableNode" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\config\Definition\ScalarNode.php:28 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\config\Definition\ScalarNode.php on line 28