Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Extension\ExtensionInterface" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/dependency-injection/Tests/Fixtures/includes/AcmeExtension.php:6 Stack trace: #0 /home/pataplou/www/patrick/pataplouf/vendor/symfony/dependency-injection/Tests/Loader/PhpFileLoaderTest.php(14): require_once() #1 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/dependency-injection/Tests/Fixtures/includes/AcmeExtension.php on line 6