widget in child theme

Thanks for this theme, but I’have a problem.
I created a child theme:
my css:

/*
Theme Name:     Bootstrap Basic Child
Theme URI:      https://www.example.it
Description:    Tema Child per il tema Bootstrap Basic
Author:         bla bla bla
Author URI:     https://example.com/about/
Template:       bootstrap-basic
Version:        0.1.0
*/

directory is : boostrap-basic-child

In function.php I add widget area:
my function.php:

add_action( 'wp_enqueue_scripts', 'enqueue_parent_theme_style' );
function enqueue_parent_theme_style() {
    wp_enqueue_style( 'parent-style', get_template_directory_uri().'/style.css' );
}

/* Register widget area
 */
function register_widget_areas() {
	register_sidebar( array(
		'name'          => __( ' Header Widget Area', 'bootstrap-basic-child' ),
		'id'            =>'header-1',
		'description'   => __( 'Add widgets here to appear in your header.', 'bootstrap-basic-child' ),
		'before_widget' => '<aside id="%1$s" class="widget %2$s">',
		'after_widget'  => '</aside>',
		'before_title'  => '<h2 class="widget-title">',
		'after_title'   => '</h2>',
	) );
}
add_action( 'widgets_init', 'register_widget_areas' );

Finally I add widgets on template but it’s not working!
In admin / theme / widget nothing happens!
It isn’t the new widget area!

if I modify directly in the parent theme it’s perfectly works!

can someone help me? Thank you