Fatal error: Uncaught Error: Class 'kartik\base\Widget' not found in /home/wittyly/public_html/staging/hr-witty/vendor/kartik-v/yii2-widget-spinner/src/Spinner.php:24 Stack trace: #0 {main} thrown in /home/wittyly/public_html/staging/hr-witty/vendor/kartik-v/yii2-widget-spinner/src/Spinner.php on line 24