Problem with in-app purchases

A

AC Question

Today I purchased a 2nd cheap phone, the Wiko Lenny 3. It works fine.
However I am encoutering an issue making in-app purchases with it.

- Purchases work on my main device, a Samsung Galaxy S6 Edge+
- Both devices are logged into the same Google account
- Both devices have the last version of the Google Play store, 7.3.07.K-all
- Both devices use the same version of the app (Mobile Strike)

Anyone have any ideas what's up and how I can fix this?