Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "set_noindex" not found or invalid function name in /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/class-wp-hook.php:324 Stack trace: #0 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #1 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #2 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/general-template.php(3050): do_action('wp_head') #3 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-content/themes/twentytwentyone/header.php(20): wp_head() #4 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/template.php(810): require_once('/home/users/2/l...') #5 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/template.php(745): load_template('/home/users/2/l...', true, Array) #6 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #7 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-content/themes/twentytwentyone-child-old/single.php(12): get_header() #8 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/template-loader.php(106): include('/home/users/2/l...') #9 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-blog-header.php(19): require_once('/home/users/2/l...') #10 /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/index.php(17): require('/home/users/2/l...') #11 {main} thrown in /home/users/2/lolipop.jp-dp09116989/web/wp-taira2024/wp-includes/class-wp-hook.php on line 324