             })
 
         }, failureBlock: { (error: Error?) in
-            completion("Could not retrieve saved asset: \(error)")
+            completion("Could not retrieve saved asset: \(String(describing: error))")
         })
 
     }

            PhotoLibraryService.getAlPhotoAlbum(assetsLibrary, album: album, completion: { (alPhotoAlbum: ALAssetsGroup?, error: String?) in

                if error != nil {
                    completion("getting photo album caused error: \(error)")
                    return
                }


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

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

