If you use this URL to log a purchase suggestion when not logged in: /cgi-bin/koha/opac-suggestions.pl?op=add_form you get taken to a login screen and after logging in the URL loses the ?op=add_form part of the URL which means the page you are taken to doesn't allow the addition of a new suggestion. To reproduce: 1) On the OPAC while not logged in 2) Go to ..../cgi-bin/koha/opac-suggestions.pl?op=add_form 3) Log in 4) The resulting page is ..../cgi-bin/koha/opac-suggestions.pl which doesn't allow the addition on a new suggestion