Xbox games aren’t opening for some in Europe - The Verge

The problems appear to have been related to the Microsoft Store, which was also preventing some Xbox owners from purchasing games.

The rest of the Xbox Live, or Xbox network, service appeared to be functioning, with Party Chat, LFG, and other parts of Xbox still accessible while games were not.

Microsoft blamed the previous issues on DNS problems, but Thursday’s error message suggested there was an authentication problem somewhere preventing some Xbox owners from accessing their digital games