Add widget position

I try to add a widget position, which I have done many times. This is the first time I’m doing it in a child theme for Twenty Sixteen.
When i add this to functions.php:
register_sidebar( array(
‘name’ => __( ‘Slideshow’, ‘twentysixteen’ ),
‘id’ => ‘sidebar-4’,
‘description’ => __( ‘Appears above the content on posts and pages.’, ‘twentysixteen’ ),
‘before_widget’ => ‘<section id=”%1$s” class=”widget %2$s”>’,
‘after_widget’ => ‘</section>’,
) );

It doesn’t show in the Dashboard. Has something changed in Twenty Sixteen?