Warning: require_once(/usr/local/www/wordpress/wp-admin/includes/class-wp-site-health.php): Failed to open stream: No such file or directory in /usr/local/www/wordpress/wp-settings.php on line 724

Fatal error: Uncaught Error: Failed opening required '/usr/local/www/wordpress/wp-admin/includes/class-wp-site-health.php' (include_path='.:/usr/local/share/pear') in /usr/local/www/wordpress/wp-settings.php:724 Stack trace: #0 /usr/local/www/wordpress/wp-config.php(97): require_once() #1 /usr/local/www/wordpress/wp-load.php(50): require_once('/usr/local/www/...') #2 /usr/local/www/wordpress/wp-blog-header.php(13): require_once('/usr/local/www/...') #3 /usr/local/www/wordpress/index.php(17): require('/usr/local/www/...') #4 {main} thrown in /usr/local/www/wordpress/wp-settings.php on line 724