Cannot buy anything in Marketplace on iPad, message to test internet connection

Hello,

We can't buy anything from the marketplace on my son's iPad Minecraft. We can connect and browse, but upon selecting something to buy this message is displayed:

"Sorry we were unable to complete your purchase. Maybe check your internet connection"

This happened in previous versions, and also happens in the latest 1.13.0

It doesn't happen on his sisters iPad and the settings, OS and game is identical.

iPad mini 4

sw: 13.1.3

Gamertag: coolalex1111

Please let me know what is the fix ?

Thanks,

Jaimie