I dont undertand this error because im use features with audio in the background. Here is the code that i use it:    private func playTrack(filePath: URL) {     self.timer?.invalidate()     do {       let songData = try Data(contentsOf: filePath, options: NSData.ReadingOptions.mappedIfSafe)       try AVAudioSession.sharedInstance().setActive(true)       player = try AVAudioPlayer(data: songData, fileTypeHint: AVFileType.mp3.rawValue)       player?.delegate = self       player?.prepareToPlay()       sliderPodcast.isEnabled = true       buttonPlayMinimized.isEnabled = true       changeState(.playing)       setupNowPlaying()     } catch {       presenter?.alertDownloadPodcast()     }   } and here: private func setupNowPlaying() {     guard let podcastContent = presenter?.getCurrentPodcastContent() else {       return     }           var nowPlayingInfo = [String : Any]()     nowPlayingInfo[MPMediaItemPropertyTitle] = podcastContent.title           if let image = imageViewPodcast.image {       nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { size in         return image       }     }     nowPlayingInfo[MPNowPlayingInfoPropertyElapsedPlaybackTime] = player?.currentTime     nowPlayingInfo[MPMediaItemPropertyPlaybackDuration] = player?.duration     nowPlayingInfo[MPNowPlayingInfoPropertyPlaybackRate] = player?.rate           MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo   }       private func updateAudioControlCenterPlaying(isPause: Bool) {     guard var nowPlayingInfo = MPNowPlayingInfoCenter.default().nowPlayingInfo else {       return     }           nowPlayingInfo[MPNowPlayingInfoPropertyElapsedPlaybackTime] = player?.currentTime     nowPlayingInfo[MPNowPlayingInfoPropertyPlaybackRate] = isPause ? 0 : 1           MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo   } ans here is the full error on AppStoreConnect: Guideline 2.5.4 - Performance - Software Requirements . Your app still declares support for audio in the UIBackgroundModes key in your Info.plist but did not include features that require persistent audio. . Next Steps . The audio key is intended for use by apps that provide audible content to the user while in the background, such as music player or streaming audio apps. Please revise your app to provide audible content to the user while the app is in the background or remove the "audio" setting from the UIBackgroundModes key. So, what do i have to do?