Após a instalação, está o ocorrendo o erro a seguir. Poderiam me ajudar ?

Warning: require_once(/var/www/miolo25-gnuteca/classes//ui/themes/miolo2/theme.class) [function.require-once]: failed to open stream: No such file or directory in /var/www/miolo25-gnuteca/etc/webinstaller/miolo.class on line 25

Fatal error: require_once() [function.require]: Failed opening required '/var/www/miolo25-gnuteca/classes//ui/themes/miolo2/theme.class' (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/miolo25-gnuteca/etc/webinstaller/miolo.class on line 25

Autor: Leonardo Rodrigues