Can’t buy songs or albums in Mac Music app

The option to buy songs and albums appears still to exist, but when I click on the ‘price’ for the music, a window pops up with the details and states ‘one-time charge’ but there’s no option to complete the purchase.

It used to be that when this window appeared, it would ask for a fingerprint to confirm the purchase, but no more.

I’m logged into my account and I have a payment method set up.

I can still buy music via the app on my phone, but sometimes it’s easier to browse and buy on my laptop.

Am I doing something wrong, or is ‘Music’ broken?

Many thanks.

[Edited by Moderator]