Fatal error: Uncaught Error: Class "WP_Sitemaps_Provider" not found in C:\xampp\htdocs\wp-includes\sitemaps\providers\class-wp-sitemaps-users.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-includes\sitemaps\providers\class-wp-sitemaps-users.php on line 17