Fatal error: Uncaught Error: Call to undefined function _deprecated_file() in /var/www/html/wp-includes/class-smtp.php:6 Stack trace: #0 /var/www/html/wp-includes/class-smtp-shim.php(3): require_once() #1 /var/www/html/wp-config.php(38): require_once('/var/www/html/w...') #2 /var/www/html/wp-load.php(37): require_once('/var/www/html/w...') #3 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...') #4 /var/www/html/index.php(29): require('/var/www/html/w...') #5 {main} thrown in /var/www/html/wp-includes/class-smtp.php on line 6