Fatal error: Uncaught Error: Class "yii\widgets\Menu" not found in /users/quirl/www/filemanager/spark/protected/vendor/kartik-v/yii2-widget-affix/Affix.php:46 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/vendor/kartik-v/yii2-widget-affix/Affix.php on line 46