My tidal voucher is not working

[Reese]

This might still be the way:

3 Months of TIDAL for free

You need to make the new account via the link: https://offer.tidal.com/voucher Enter the voucher code you got from DenonDJ and create the new Tidal account from that same page. Otherwise it will use the default 30 day trial. I don’t think Switzerland has a complete Tidal block. Perhaps some songs on Tidal do.