Fatal error: Uncaught Error: Class 'WP_Sitemaps_Provider' not found in E:\www\web\wp-includes\sitemaps\providers\class-wp-sitemaps-posts.php:17
Stack trace:
#0 {main}
thrown in E:\www\web\wp-includes\sitemaps\providers\class-wp-sitemaps-posts.php on line 17