Fatal error: Uncaught Error: Interface 'Symfony\Component\DependencyInjection\Extension\ExtensionInterface' not found in /home/almasai/www/people/_old_site/vendor/symfony/tests/Symfony/Tests/Component/DependencyInjection/Fixtures/includes/ProjectExtension.php:7 Stack trace: #0 /home/almasai/www/people/_old_site/vendor/symfony/tests/Symfony/Tests/Component/DependencyInjection/ContainerBuilderTest.php(24): require_once() #1 {main} thrown in /home/almasai/www/people/_old_site/vendor/symfony/tests/Symfony/Tests/Component/DependencyInjection/Fixtures/includes/ProjectExtension.php on line 7