Fatal error: Uncaught Error: Interface 'Swift_Plugins_Logger' not found in /mnt/www/fss/service-center/vendor/yiisoft/yii2-swiftmailer/src/Logger.php:55 Stack trace: #0 {main} thrown in /mnt/www/fss/service-center/vendor/yiisoft/yii2-swiftmailer/src/Logger.php on line 55