Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /var/www/vhosts/kavli-live/vendor/symfony/swiftmailer-bundle/Symfony/Bundle/SwiftmailerBundle/DependencyInjection/SwiftmailerExtension.php:24 Stack trace: #0 {main} thrown in /var/www/vhosts/kavli-live/vendor/symfony/swiftmailer-bundle/Symfony/Bundle/SwiftmailerBundle/DependencyInjection/SwiftmailerExtension.php on line 24