PHP script '/usr/share/nginx/html/wap/maintenancewap.php' is protected by SourceGuardian and requires a SourceGuardian loader 'ixed.7.0.lin' to be installed.

1) Click here to download the required 'ixed.7.0.lin' loader from the SourceGuardian site
2) Install the loader to /usr/lib/php/20151012
3) Edit /etc/php/7.0/fpm/php.ini and add 'extension=ixed.7.0.lin' directive
4) Restart the web server