Meta Box Group not display in post type

Hi, can you post your code?

$checkgroup_prefix='filka_'; //тестируем как вообще работают группы
//=============================
    
	$meta_boxes[] = array(
		'title'  => __( 'Тестируем', 'your-prefix' ),
		'post_types' => array( 'post', 'page' ),
		'show'   => array(
            'template'    => array( 'template-about-us.php' ),
			),
		'fields' => array(
		        // группа  - редакция
		        array(
		            'name' => 'Тестируем поле', // Optional
		            'id' => 'test_id',
		            'type'   => 'group', // Group type
		            'clone'=>false,
		            // List of sub-fields
		            'fields' => array(
						//фио
						array(
							'name'  => __( 'ПРОВЕРКА', 'your-prefix' ),
							'id'    => "{$checkgroup_prefix}fio",
							'type'  => 'text',
						),
				
					),
		        ),

		    ),
	
	);

$group_values = rwmb_meta( 'test_id' );
if ( ! empty( $group_values ) )
{
    foreach ( $group_values as $group_value )
    {
        $value = isset( $group_value['filka_fio'] ) ? $group_value['filka_fio'] : '';
        echo $value.'<br>'; // Display sub-field value
        
    }
}

What was the result of this? I have the same problem, Willing to talk here about it so others can learn and resolve their problem.

I can't even get this to return anything

$group_values = rwmb_meta( 'sidebar_group' );
var_dump($group_values);