Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Extension\Extension' not found in /var/www/html/autocar/vendor/symfony/framework-bundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php:19 Stack trace: #0 {main} thrown in /var/www/html/autocar/vendor/symfony/framework-bundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php on line 19