         do {
             sourceData = try getDataFromURL(url)
         } catch {
-            completion(nil, "\(error)")
+            completion(nil, "\(String(describing: error))")
             return
         }
 

                completion(photoAlbum, nil)
            }
            else {
                completion(nil, "\(error)")
            }
        }
    }

            assetsLibrary.writeVideoAtPath(toSavedPhotosAlbum: videoURL) { (assetUrl: URL?, error: Error?) in

                if error != nil {
                    completion(nil, "Could not write video to album: \(String(describing: error))")
                    return
                }

