Fatal error: Uncaught Error: Class "yii\widgets\ActiveForm" not found in /var/www/html/prod/vendor/kartik-v/yii2-widget-activeform/src/ActiveForm.php:52 Stack trace: #0 {main} thrown in /var/www/html/prod/vendor/kartik-v/yii2-widget-activeform/src/ActiveForm.php on line 52