Fatal error: Uncaught Error: Interface "Symfony\Component\Config\Definition\ConfigurationInterface" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/config/Tests/Builder/Fixtures/Placeholders.php:17 Stack trace: #0 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/config/Tests/Builder/Fixtures/Placeholders.php on line 17