Просмотр файла modules/registration/templates/registration_closed.phtml

<?php $this->layout(
    'system::layout/default',
    [
        'title'      => __('Registration'),
        'page_title' => __('Registration'),
    ]
) ?>
<?= $this->fetch(
    'system::app/alert',
    [
        'alert_type' => 'alert-info',
        'alert'      => __('Registration is temporarily closed'),
    ]
) ?>