Block doesn't render on frontend

Hi! I'm trying to male my first block and it's working perfect on backend, but on frontend appers nothing. I can't find out why.

Block template:

<?php
echo 'test output';
if ( empty( $attributes['data'] ) ) return;

$data = to_object($attributes['data']);
?>

<?php if ($data->triggers) { ?>
<div class="text-trigger">
    <?php foreach ($data->triggers as $trigger) { ?>
    <div class="text-trigger__item">
        <div class="text-trigger__item-inner">
            <div class="text-trigger__item-icon" style="background-image: url(<?= wp_get_attachment_image_url($trigger->icon, 'icon-0x100'); ?>);"></div>
            <div class="text-trigger__item-text">
                <?= $trigger->text; ?>
            </div>
        </div>
    </div>
    <?php } ?>
</div>
<?php } ?>

MetaBox:

<?php

$meta_boxes[] = [
    'title'           => 'Текстовые триггеры',
    'id'              => 'text-trigger',
    //'description'     => 'A custom hero content block',
    'type'            => 'block',
    'icon'            => 'awards',
    'category'        => 'layout',
    'context'         => 'side',
    'render_template' => get_template_directory() . '/gutenberg/text-trigger.php',
    'supports' => [
        'align' => ['wide', 'full'],
    ],
    'fields'          => [
        [
            'id'                => 'triggers',
            'type'              => 'group',
            'name'              => 'Контент',
            'clone'             => true,
            'sort_clone'        => true,
            'add_button'        => '+',
            'fields'            => [
                [
                    'id'            => 'icon',
                    'type'          => 'single_image',
                    'name'          => 'Иконка',
                ],
                [
                    'id'            => 'text',
                    'type'          => 'text',
                    'name'          => 'Текст',
                ],
            ]
        ],
    ],
];