You do not have a link list with a handle set to ready-to-ship-listo-para-enviar, or you do and it's empty. Go ahead and create a link list called SHOP CLOSED FROM 21st to 31st of DECEMBER / TIENDA CERRADA DEL 27 AL 31 DE DICIEMBRE on your Navigation page and populate that link list with links that point to collections, to see collections listed here. Make sure the link list also has a handle set to ready-to-ship-listo-para-enviar.