Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Definition\Builder\NodeDefinition' not found in /home/app/htdocs/lidia/vendor/symfony/config/Definition/Builder/VariableNodeDefinition.php:21 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/config/Definition/Builder/VariableNodeDefinition.php on line 21