If you’re having issues getting your games or apps to launch on Xbox One or PC, you aren’t alone. Microsoft is encountering issues with Xbox Live across both platforms, and it’s looking into the issue.
We are aware that some users are encountering issues launching their games. Our engineers are investigating. You can check here and our status page for updates. https://t.co/kQKp1LYR4o.
— Xbox Support (@XboxSupport) October 23, 2020
The problem doesn’t appear to extend to other Xbox Live services, including online gameplay. You shouldn’t have any issue playing a multiplayer title, provided you can get your game to load, but there isn’t a timetable for when the issues will be fixed.
If you visit the official Microsoft support page, you can sign up for notifications about exactly when the problem is resolved.