Fatal error: Uncaught Error: Class "yii\base\Component" not found in /users/quirl/www/filemanager/spark/protected/humhub/modules/activity/components/MailSummary.php:30 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/modules/activity/components/MailSummary.php on line 30