The ability to make an in-app purchase requires a functioning payment method.
A payment method is often required to verify your identity, prevent fraud and ensure a streamlined process if you decide to make in-app purchases or purchase paid apps later.
It also helps companies manage age restrictions and regional content availability.
Check your payment method in Settings ➢ [your name] ➢ Payment & Shipping, ensure it’s valid and update if needed. Also, sign out and back into your Apple Account, then try again.
If it still fails, contact Apple Support directly.
Good Luck! 👋🏼😉
Smiliñ 😎 Brian