I am trying to start playing a sound from a background task via an AVAudioPlayer that is instantiated then, so here\'s what I\'ve got.
For readability I cut out all user
Seems to me as if you do not have the appropriate background mode set?
Also, looks like another user had the same issue and fixed it with an Apple Docs post. Link to Post
You may need to just do the step to set the audio session as active:
[audioSession setActive:YES error:&activationError];
Hope it helps!