Erro, o site não acha o arquivo Consumer.php

[agcricardo]

Caros, utilizao o pagseguro no virtuemart do Joomla, funcionou bem até a semana passada, e agora, a seguinte mensagem de erro asté aparecendo no site na hora de concluir a compra:

Warning: ini_set() has been disabled for security reasons in /home/livraria/public_html/shop/libraries/openid/consumer.php on line 6

Warning: require_once(Auth/OpenID.php) [function.require-once]: failed to open stream: No such file or directory in /home/livraria/public_html/shop/libraries/openid/Auth/OpenID/Consumer.php on line 169

Fatal error: require_once() [function.require]: Failed opening required 'Auth/OpenID.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/livraria/public_html/shop/libraries/openid/Auth/OpenID/Consumer.php on line 169
Not Found
The requested URL /shop/function.require-once was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Alguém conhece caso parecido? como solucionar? grato