No route matches {:action=>"download", :controller=>"arxiusconv", :convocatoria_id=>#<Convocatoria id: 8484, create_date: "2021-11-04 14:07:12", type_id: 2, ordre: 0, write_uid: 55, visible: true, external_code: nil, destacar: false, date_entrega_esborrany: nil, entitat_convocant: 34612, create_uid: 55, title: "Research Grants", message_last_post: nil, date_entrega_eoi: nil, otherid: 8369, date_entrada: "2021-11-05", publicat: false, date_caducitat_interna: "2022-01-25", write_date: "2021-11-05 12:10:50", internal_code: 14765, date_caducitat_externa: "2022-02-01", multiples_acabaments: false, actiu: 0, code_sirecs: nil>, :id=>#<OdooAttachment >}
Try running rake routes for more information on available routes.