Fatal error: Uncaught Error: Class "yii\bootstrap\Html" not found in /users/quirl/www/filemanager/spark/protected/humhub/modules/ui/filter/widgets/views/dropdownInput.php:17 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/modules/ui/filter/widgets/views/dropdownInput.php on line 17