Warning: require_once(./libraries/config.php): failed to open stream: No such file or directory in /var/www/vhosts/duykhang.vn/httpdocs/index.php on line 12

Fatal error: require_once(): Failed opening required './libraries/config.php' (include_path='.:/opt/plesk/php/5.6/share/pear') in /var/www/vhosts/duykhang.vn/httpdocs/index.php on line 12