Hermano cuando voy a configurar mi proxy http en zentyal 6.0 explcame que no entiendo

Hermano cuando voy a configurar mi proxy http en zentyal 6.0 por web me dice esto

Can't locate object method "throw" via package "Can't call method "value" on an undefined value at /usr/share/perl5/EBox/Squid/Model/GeneralSettings.pm line 111. " (perhaps you forgot to load "Can't call method "value" on an undefined value at /usr/share/perl5/EBox/Squid/Model/GeneralSettings.pm line 111. "?) at /usr/share/perl5/EBox/Model/DataTable.pm line 1367. ...propagated at /usr/share/perl5/EBox/CGI/Controller/DataTable.pm line 232.