Fatal error: Uncaught Error: Class 'yii\widgets\ActiveForm' not found in /var/www/html/autocar/vendor/kartik-v/yii2-widget-activeform/src/ActiveForm.php:49 Stack trace: #0 {main} thrown in /var/www/html/autocar/vendor/kartik-v/yii2-widget-activeform/src/ActiveForm.php on line 49