In-App Expansion Purchases Not Allowed? – Carcassonne Review

We’ve been playing Carcassonne for over a decade and love the app as much as the board game. Each time I to buy the German cathedral and Abbott expansions, I get a message saying in-app purchases are not allowed. I’ve checked my settings but cannot find any reason. Please help.
Review by Vanguard06 on Carcassonne.