Fatal error: Uncaught Error: Class 'yii\base\Widget' not found in /home/wittyly/public_html/staging/hr-witty/vendor/yiisoft/yii2-jui/Widget.php:18 Stack trace: #0 {main} thrown in /home/wittyly/public_html/staging/hr-witty/vendor/yiisoft/yii2-jui/Widget.php on line 18