Yoast Sitemaps funktionieren nicht mehr

<?phpob_start("ob_gzhandler");
function maxe_remove_image_sizes() {add_image_size( 'shop_thumbnail', '90', '90', true );add_image_size( 'shop_catalog', '150', '150', true );add_image_size( 'shop_single', '300', '300', true );
add_image_size( 'loop-thumb', '355', '9999', false ); // kleinere Bilder auf der Startseite und Folgeseitenadd_image_size( 'firstloop-thumb', '730', '9999', false ); // die 2 grossen Bilder auf der Startseiteadd_image_size( 'related-thumb', '90', '9999', false ); // Sidebar und Einzelansicht
add_image_size( 'post-thumbnail', '0', '0', false ); // 220x9999add_image_size( 'featured-thumb', '0', '0', false ); // 250x9999}add_action( 'after_setup_theme', 'maxe_remove_image_sizes', 11 );


function maxe_rewrite_rules() {    global $wp_rewrite;    // $wp_rewrite->author_base = $author_slug;    // print_r($wp_rewrite);    $wp_rewrite->author_base        = 'autor';    $wp_rewrite->flush_rules();}add_action('init', 'maxe_rewrite_rules');


function maxe_gallery_shortcode( $atts ) {    $atts['link'] = 'file';    return gallery_shortcode( $atts );}add_shortcode( 'gallery', 'maxe_gallery_shortcode' );


function maxe_scripts_styles() {    //wp_deregister_script( 'jquery' );    //wp_register_script( 'jquery', 'http://code.jquery.com/jquery-latest.min.js', false, null, true );    //wp_enqueue_script( 'jquery' );    wp_enqueue_script( 'ahover', get_stylesheet_directory_uri() . '/js/jquery.ahover.js', false, null, true);    wp_enqueue_script( 'dropdown_cat', get_stylesheet_directory_uri() . '/js/dropdown_cat.js', false, null, true);}
add_action( 'wp_enqueue_scripts', 'maxe_scripts_styles' );


add_theme_support( 'woocommerce' );
add_action( 'pre_get_posts',  'change_number_of_posts_for_archives'  );
function change_number_of_posts_for_archives( $query ) {  if ( is_archive() && $query->is_main_query() ) {          $query->set( 'posts_per_page', 14);  }
  return $query;}  
?>