Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /var/www/api_backup/vendor/symfony/framework-bundle/DependencyInjection/FrameworkExtension.php:139 Stack trace: #0 {main} thrown in /var/www/api_backup/vendor/symfony/framework-bundle/DependencyInjection/FrameworkExtension.php on line 139