PHP script '/var/www/vhosts/912711.xyz/web/wordpress/wp-content/themes/vieu/include/fn-theme.php' is protected by SourceGuardian and requires a SourceGuardian loader 'ixed.7.1.lin' to be installed. 1) Click here to download the required 'ixed.7.1.lin' loader from the SourceGuardian site 2) Install the loader to /opt/plesk/php/7.1/lib64/php/modules 3) Edit /opt/plesk/php/7.1/etc/php.ini and add 'extension=ixed.7.1.lin' directive 4) Restart the web server