Fatal error: Uncaught Error: Class 'yii\base\Widget' not found in /mnt/www/fwrsxt/vendor/kartik-v/yii2-krajee-base/Widget.php:22 Stack trace: #0 {main} thrown in /mnt/www/fwrsxt/vendor/kartik-v/yii2-krajee-base/Widget.php on line 22