Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Extension\Extension' not found in /var/www/html/autocar/vendor/symfony/http-kernel/Tests/Fixtures/ExtensionPresentBundle/DependencyInjection/ExtensionPresentExtension.php:17 Stack trace: #0 {main} thrown in /var/www/html/autocar/vendor/symfony/http-kernel/Tests/Fixtures/ExtensionPresentBundle/DependencyInjection/ExtensionPresentExtension.php on line 17