Enable Ajax Validation

Enable the Ajax validation by using the 'enableAjaxValidation'=>true, for the formOptions

use buttflatteryormwizard\FormWizard;
echo FormWizard::widget([
    'formOptions'=>[
        'id'=>'my_form_ajax',
        'enableClientValidation'=>false,
        'enableAjaxValidation'=>true,
    ],
    'steps' => [
        [
            'model' => $shootsModel,
            'title' => 'My Shoots',
            'description' => 'Add your shoots',
            'formInfoText' => 'Fill all fields'
        ],
        [
            'model' => $shootTagModel,
            'title' => 'Shoot Tags',
            'description' => 'Add your shoot tags',
            'formInfoText' => 'Fill all fields'
        ],
    ]
]);

//controller code

public function actionIndex()
{
    $shootModel = new \app\models\Shoots();
    $shootTagModel = new \app\models\ShootTag();


    //for ajax validation
    if (Yii::$app->request->isAjax && Yii::$app->request->isPost) {
        Yii::$app->response->format = Response::FORMAT_JSON;
        $shootModel->load(Yii::$app->request->post());
        $shootTagModel->load(Yii::$app->request->post());
        return array_merge(ActiveForm::validate($shootModel),ActiveForm::validate($shootTagModel) );
    }


    return $this->render('index', ['shootsModel' => $shootModel, 'shootTagModel' => $shootTagModel]);
}