Why get Unable to verify your data submission error in Yii2?
If you create the form manually (i.e. without using the yii form methods), you should add an input field like this: <input type=”hidden” name=”_csrf” value=”<?=Yii::$app->request->getCsrfToken()?>” /> source: http://zero-exception.blogspot.com/2015/01/yii2-using-csrf-token.html