Fatal error: Uncaught Error: Class "Symfony\Component\Config\Definition\Builder\NodeDefinition" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/config/Tests/Fixtures/Builder/BarNodeDefinition.php:18 Stack trace: #0 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/config/Tests/Fixtures/Builder/BarNodeDefinition.php on line 18