If you are having issues using certain aspects of Xbox Live then don't worry because you are not alone.
Microsoft are aware of the issues that are affecting services such as Twitch, PBS and certain features of Xbox Live.
You may be experiencing issues posting statistics to leaderboards and unlocking achievements on Xbox One. Some gamers are also reporting black screen whilst attmepting to launch games or applications on Xbox 360. Microsoft are fully aware of these issues as well as the affected services listed below and are all over it, so rest assured normal services will be resumed soon!
If you are having difficulties not listed here then let us know below and we can reach out on your behalf.