Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Definition\ArrayNode' not found in /home/app/htdocs/ninja/vendor/symfony/config/Definition/PrototypedArrayNode.php:24
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/symfony/config/Definition/PrototypedArrayNode.php on line 24