Fatal error: Uncaught Error: Class "WP_Site_Health" not found in /var/www/html/wp-settings.php:684 Stack trace: #0 /var/www/html/wp-config.php(87): require_once() #1 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...') #2 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...') #3 /var/www/html/index.php(17): require('/var/www/html/w...') #4 {main} thrown in /var/www/html/wp-settings.php on line 684