Fatal error: Uncaught Error: Class 'yii\base\Widget' not found in /var/www/up.tantal-metall.com/yii_up/vendor/kartik-v/yii2-krajee-base/src/Widget.php:20 Stack trace: #0 {main} thrown in /var/www/up.tantal-metall.com/yii_up/vendor/kartik-v/yii2-krajee-base/src/Widget.php on line 20