Fatal error: Uncaught Error: Class "Yii\base\Model" not found in /users/quirl/www/filemanager/spark/protected/humhub/modules/comment/models/forms/CommentForm.php:16 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/modules/comment/models/forms/CommentForm.php on line 16