Fatal error: Uncaught Error: Class "kartik\base\AssetBundle" not found in /users/quirl/www/filemanager/spark/protected/vendor/kartik-v/yii2-widget-affix/AffixAsset.php:18 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/vendor/kartik-v/yii2-widget-affix/AffixAsset.php on line 18