Fatal error: Uncaught Error: Class 'yii\mail\BaseMessage' not found in /home/mvihurz/v4/vendor/yiisoft/yii2-symfonymailer/src/Message.php:18 Stack trace: #0 {main} thrown in /home/mvihurz/v4/vendor/yiisoft/yii2-symfonymailer/src/Message.php on line 18