Why is the checkbox not accepting its own template?

Question

Yii

In the registration in the label checkbox'a in the template I inserted a link. displayed correctly and worked

<?= $form->field($model, 'checkbox')
                                  ->checkbox([
                                      'labelOptions' => [
                                          'class' => 'checkbox-inline'
                                      ],
                                      'label' => '  Я согласен(а) с',
                                      'template' => "{input}{label} <a href=\'#\'>условиями пользовательского соглашения</a>",
                                      'onchange' => "document.getElementById('submit').disabled = !this.checked",
                                      'disabled' => false
                                  ]); ?>

in browser shows

then installed module yii2-user. registration is different. I inserted the same code there, then the result is the same

in the browser, so

Why? something went wrong?