Error on saving downloaded video to Photo gallery

Code Block 
   func didFinishedDownloading(to location: URL) {
    let exists = FileManager.default.fileExists(atPath: location.path)
    debugPrint("EXISTS", exists)
     
    var attemptsToSave: Int = 0
     
    func saveToCameraRoll() {
      PHPhotoLibrary.shared().performChanges({
        PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: location)
      }) { saved, error in
        guard error == nil, attemptsToSave < 3 else {
          debugPrint("ERROR ON SAVING", error, error?.localizedDescription, attemptsToSave)
          if attemptsToSave < 3 {
            DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
              attemptsToSave+=1
              saveToCameraRoll()
            }
          } else {
            DispatchQueue.main.async { [weak self] in
              self?.currentState = .error(.download)
            }
          }
          return
        }
         
         
         
        DispatchQueue.main.async { [weak self] in
          if saved {
            debugPrint("TIME INTERVAL", self?.completionTimer?.timeInterval)
             
          }
        }
      }
    }
     
    saveToCameraRoll()
  }