Fatal error: Uncaught Error: Class "WP_Sitemaps_Provider" not found in /home/.sites/201/site2038680/web/wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php:17
Stack trace:
#0 {main}
  thrown in /home/.sites/201/site2038680/web/wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php on line 17