Submit form doesn't work. Why?

Question

Yii

Hello!
There is a form with different elements. When you click on the submit button - the page is reloaded and not submitted, i.e. I don't get into the $model->load condition at all. Why is that?
I open and close the form like this:

<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?>
<?php ActiveForm::end(); ?>

This is what is in the controller:

$this->view->title = Yii::$app->params['applicationName'].' | '.Yii::t('app', 'Documents circulation');
            $model = new Documents();
            if($model->load(Yii::$app->request->post()) && $model->validate()) {
                echo 'submitted!';
            }
            return $this->render('new', compact('model'));

Answer 1

This means that loading or validation does not work, the validator interferes somewhere and you do not show its field or its errors.
Try in the controller before rendering to see what's wrong with the model:

if($_POST) {
    header('content-type: text/html; charset=utf-8');
    echo '<pre>';
    @print_r($model);
    echo '</pre>';
    exit(__FILE__ . ': ' . __LINE__);
}

or immediately ask for all errors ->getErrors

Answer 2

Good evening.
So you are not validating, most likely.
Show the validation rules and what fields you have in the form.