[Plugin: Facebook Photo Fetcher] Not compatible with custom post types?

Normally, when you save a post, it is converted to a complete post with all the images inserted etc. The problem is: the plugin doesn’t seem to recognise this tag! Or maybe it is disabled for custom post types? I don’t know, but it does absolutely nothing when I paste the magic tag in a custom post type and I don’t know why!

This is my cpt:

add_action( 'init', 'register_cpt_foto' );

function register_cpt_foto() {

    $labels = array(
        'name' => _x( 'Fotoalbums', 'foto' ),
        'singular_name' => _x( 'Fotoalbum', 'foto' ),
        'add_new' => _x( 'Nieuw fotoalbum', 'foto' ),
        'add_new_item' => _x( 'Voeg nieuw fotoalbum toe', 'foto' ),
        'edit_item' => _x( 'Bewerk fotoalbum', 'foto' ),
        'new_item' => _x( 'Nieuw fotoalbum', 'foto' ),
        'view_item' => _x( 'Bekijk fotoalbum', 'foto' ),
        'search_items' => _x( 'Zoek in fotoalbums', 'foto' ),
        'not_found' => _x( 'Geen fotoalbums gevonden', 'foto' ),
        'not_found_in_trash' => _x( 'Geen fotoalbums gevonden in de prullenmand', 'foto' ),
        'parent_item_colon' => _x( 'Parent foto:', 'foto' ),
        'menu_name' => _x( 'Foto\'s', 'foto' ),
    );

    $args = array(
        'labels' => $labels,
        'hierarchical' => true,
        'description' => 'Het posttype dat alle fotoalbums verzorgt.',
        'supports' => array( 'title', 'editor', 'excerpt', 'comments', 'page-attributes' ),
        'taxonomies' => array( 'post_tag' ),
        'public' => true,
        'show_ui' => true,
        'show_in_menu' => true,

        'show_in_nav_menus' => true,
        'publicly_queryable' => true,
        'exclude_from_search' => false,
        'has_archive' => true,
        'query_var' => true,
        'can_export' => true,
        'rewrite' => array(
            'slug' => 'fotos',
            'with_front' => false
        ),
        'capability_type' => 'post'
    );

    register_post_type( 'foto', $args );
}

https://www.ads-software.com/extend/plugins/facebook-photo-fetcher/