Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Definition\ArrayNode' not found in /home/app/htdocs/lidia/vendor/symfony/config/Tests/Fixtures/BarNode.php:16 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/config/Tests/Fixtures/BarNode.php on line 16