Warning: require_once(/var/www/html/wp-admin/includes/file.php): failed to open stream: No such file or directory in /var/www/html/wp-content/plugins/all-in-one-seo-pack/app/Common/Utils/Filesystem.php on line 57

Fatal error: require_once(): Failed opening required '/var/www/html/wp-admin/includes/file.php' (include_path='.:/usr/share/php') in /var/www/html/wp-content/plugins/all-in-one-seo-pack/app/Common/Utils/Filesystem.php on line 57