Debugging SwiftAudioEx.AudioPlayerError.PlaybackError error 4 on iOS

[asindhu]

In Sentry I'm getting some instances in the wild of the aforementioned error and I'm trying to figure out how to repro & debug. I realize this is passing up a native iOS error of some kind, but I can't find any info as to what "error 4" could mean from the iOS side. Any ideas?

Second, I can't figure out how to determine which track is actually causing this error. I have a playlist of several tracks that I load using setQueue. And I have a listener for the PlaybackError event on the track player, which is where I see this error come up. However, because the error comes up on initial load of the queue, before anytihng is playing, I don't think I have any way to tell which of the several tracks in my queue are actually the cause of this error. How do I determine which track in my queue caused an initial load error like this one?

Thanks so much for any help.