Apple wallet has my cards' details from iPhone but won't add them to Macbook wallet

My MacBook Pro Apple wallet has no cards in it. When I go to 'Add Cards' it shows a list, all ticked, of all the cards that I have added to my wallet both on my iPad and my iPhone, when I click on 'next' it shows one card at a time but the 'next' button is shaded out as though I still have something to click on or fill out and the only option is 'add this card later' or 'back'. Basically I can't add/use any of the existing cards in my wallet or add any new ones on my MacBook Pro.

I've synced everything to iCloud (and logged out and in) but still nothing seems to work. Does anyone understand what might be going on?