Alps Crossing Ticket Kamikochi Route

We'd like to purchase on line Alps Crossing Ticket Kamikochi Route.
https://www.alpico.co.jp/en/alps-crossing/ forwards us onto https://www.kkday.com/en/product/25442-japan-nagano-alps-crossing-rout... for purchasing on line.

But we get the message that tickets are sold out w/o asking us about the date of the trip.
Is there some problem with this?
Please, advise.

The Shinhotaka Ropeway is current out of service through July 31. I suspect that the pass is temporarily unavailable due to the ropeway closure, but I am not sure.