Fatal error: Uncaught Error: Class 'kartik\base\Widget' not found in /home/trafqete/public_html/vendor/kartik-v/yii2-sortable/src/Sortable.php:24 Stack trace: #0 {main} thrown in /home/trafqete/public_html/vendor/kartik-v/yii2-sortable/src/Sortable.php on line 24