Argghhh, XF site stopped working. How to fix please?

[Mouth]

My XF site has broken and not working, and after around 30mins of googling I'm not sure of the solution. Help appreciated.

Site: www.netrider.net.au
Info: Nginx, php5-fpm

Error from nginx error log ..

2013/02/26 07:09:59 [error] 13127#0: *29 FastCGI sent in stderr: "PHP message: PHP Fatal error:  require_once(): Failed opening required '' (include_path='/var/www/netrider/library:.:.:/usr/share/php:/usr/share/pear') in /var/www/netrider/library/Zend/Filter.php on line 209" while reading response header from upstream, client: 149.135.146.xx, server: netrider.net.au, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "www.netrider.net.au"

 

[Mouth]

*Ignore* Located the issue. Thanks.