Error code -16042

We have a video playback application and are logging errors as follows:

Code Block swiftfunc errorMessage(_ error: NSError) -> String {
    var code = "\(error.code)"
    if let underlyingError = error.userInfo[NSUnderlyingErrorKey] as? NSError {
      code += ":\(underlyingError.code)"
    }
    return "\(code) - \(error.localizedDescription)"
}

Code Block swift
func errorMessage(_ error: NSError) -> String {
var code = "\(error.code)"
if let underlyingError = error.userInfo[NSUnderlyingErrorKey] as? NSError {
code += ":\(underlyingError.code)"
}
return "\(code) - \(error.localizedDescription)"
}

The error is reported when the NotificationCenter reports .AVPlayerItemFailedToPlayToEndTime for the AVPlayerItem being used.

We have come across the following errors being reported:

Code Block -11800:-16042 - The operation could not be completed

Code Block
-11800:-16042 - The operation could not be completed

Unfortunately, I cannot find any information on what error code -16042 means; furthermore, it is generally difficult to find any information on AVFoundation error codes. Would anyone have advice on how best to find information on these (as well as help on understanding -16042)?