Fatal error: Uncaught Error: Interface "yii\base\BootstrapInterface" not found in /users/quirl/www/filemanager/spark/protected/humhub/components/bootstrap/LanguageSelector.php:19 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/components/bootstrap/LanguageSelector.php on line 19