This morning, shortly after Microsoft published an update for its native Windows Phone music app, the Xbox Music service encountered some issues. We received reports from readers stating that they're unable to access their music collection on a Windows Phone, which we were able to confirm with our own access severely hampered. Luckily, Microsoft is well aware of the problem and is actively rolling out a fix as you read this article.
Attempting to stream a track in a collection would show a "C101A011" or "805A0193" error, while others have reported being able to access just 30 seconds of each music file (as though their Xbox Music Pass somehow became invalid). According to the Xbox status website, this has been resolved and we can expect to be able to enjoy our beats soon enough:
"We have good news, Xbox members. If you were having trouble streaming content from Xbox Music to your Windows Phone, we're happy to say we've fixed the issue, and you can once again enjoy your favorite tunes. Thanks for your patience!"
If you're still experiencing trouble with the service, attempt a reboot of your Windows Phone and give it some time for Xbox Music to recover.
Source: Xbox; big thanks to everyone who tipped us!