Custom Post Type Pretty Structure

I’ve configure permastructure for posts to /blog/%postname%/, I’ve created a page with slug about-us and I used the code bellow to register team_member CPT and it is working. I think you had a extra “https://wordpress.stackexchange.com/” in the rewrite argument. Also, you don’t need to works with global $wp_rewrite; if you set the rewrite argument when the post type is registered, WordPress will create the rewrite rules for you. I’ve also made some comments to save non-needed code:

add_action("init", "register_cpt_team_member");
function register_cpt_team_member() {

    $labels = array(
        //If "label" is set, the "name" in "labels" argument is usually not needed
        //'name'                => _x( 'Team Members', 'Post Type General Name', 'client' ),
        // [...]
    );
    $args = array(
        //label should a plural descriptive name
        'label'               => __( 'Team Members', 'client' ),
        //description should include ...... a description ;)
        'description'         => __( 'Custom post type to manage team members', 'client' ),
        //As the only "labels" set was "name" and it overriden by general "label" you don't need this
        //'labels'              => $labels,
        'supports'            => array( 'title', 'editor', 'thumbnail' ),
        //hierarchical is by default false, you don't need this
        //'hierarchical'      => false,
        'public'              => true,
        //show_ui is by default set to same value of "public", so you don't need this
        //'show_ui'             => true,
        //show_in_menu by default set to same value of "show_ui", so you don't need this
        //'show_in_menu'             => true,
        //show_in_nav_menus is by default set to same value of "public", so you don't need this
        //'show_in_nav_menus'   => true,
        //show_in_admin_bar by default set to same value of "show_in_menu", so you don't need this
        //'show_in_admin_bar'   => true,
        'menu_position'       => 5,
        //can_export is by default set to true, so you don't need this
        //'can_export'          => true,
        'has_archive'         => true,
        //exclude_from_search is by default set to opposite of "public", so you don't need this
        //'exclude_from_search' => false,
        //publicly_queryable is by default set to same value of "public" argumente, so you don't need this
        //'publicly_queryable'  => true,
        'capability_type'     => 'page',
        'rewrite' => array (
            'slug' => '/about-us/team',
            'with_front' => false
        )
    );

    register_post_type( 'team_member', $args );

}

So, the above code can be written like this with the same result:

add_action("init", "register_cpt_team_member");
function register_cpt_team_member() {

    $args = array(
        'label'               => __( 'Team Members', 'client' ),
        'description'         => __( 'Custom post type to manage team members', 'client' ),
        'supports'            => array( 'title', 'editor', 'thumbnail' ),
        'public'              => true,
        'menu_position'       => 5,
        'has_archive'         => true,
        'capability_type'     => 'page',
        'rewrite' => array (
            'slug' => '/about-us/team',
            'with_front' => false
        )
    );

    register_post_type( 'team_member', $args );

}