i was installing koha3 alpha and i have the follow error Software error: Can't call method "do" on unblessed reference at /usr/share/koha/lib/C4/Context.pm line 609. Compilation failed in require at /usr/share/koha/lib/C4/Members.pm line 24. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Members.pm line 24. Compilation failed in require at /usr/share/koha/lib/C4/Auth.pm line 31. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Auth.pm line 31. Compilation failed in require at /usr/share/koha/opac/cgi-bin/opac/opac-main.pl line 22. BEGIN failed--compilation aborted at /usr/share/koha/opac/cgi-bin/opac/opac-main.pl line 22. CGI::Carp this was in the firefox, at time to see intranet and opac tell me what is the error