PHP script '/var/www/html/inc/functions.php' is protected by SourceGuardian and requires a SourceGuardian loader 'ixed.5.6.lin' to be installed.

1) Click here to download the required 'ixed.5.6.lin' loader from the SourceGuardian site
2) Install the loader to /usr/lib/php5/20131226
3) Edit /etc/php5/apache2/php.ini and add 'extension=ixed.5.6.lin' directive
4) Restart the web server