Why get Unable to verify your data submission erro

Question

Error:

Unable to verify your data submission error

Create one public function in Yii2. But, submit data not accept in this method, see following error images. Why is this happen?

Answer 1

Add this in your controller:

 public $enableCsrfValidation = false;

Answer 2

Check whether there is hidden input in your form with CSRF token. It should look like

<input type="hidden" name="_csrf" value="ZEZ6Y0xrY3ARGS42fTwhMQgkDgF6BCEGEx4SMXQMBR4CPy0iPCIwNQ==">

Answer 3

Add this in the head section of your layout: <?= Html::csrfMetaTags() ?>