Firebase下载错误Error Domain = FIRStorageErrorDomain代码= -13000

Question

我正在尝试从Firebase下载数据，仅在iOS 8设备上失败，其他设备运行良好，出现此错误：

  

Firebase下载错误错误域= FIRStorageErrorDomain代码= -13000“发生未知错误，请检查服务器响应。” UserInfo = 0x1471bf10 {ResponseErrorDomain = NSURLErrorDomain，NSErrorFailingURLKey = https://firebasestorage.googleapis.com/v0/b/api-project-xxxxxxxxxxx.appspot.com/o/xxxxxxxxxxxxxxxxx%2Fdata.xx?alt=media，object = xxxxxxxxxxxxxxxxx / data.xx，NSErrorFailingURLStringKey = https://firebasestorage.googleapis.com/v0/b/api-project-xxxxxxxxxxxx.appspot.com/o/xxxxxxxxxxxxxxxxxx%2Fdata.xx?alt=media，ResponseErrorCode = -1100，bucket = api-project-xxxxxxxxxxxxx.appspot.com，NSLocalizedDescription =发生未知错误，请检查服务器响应。}

这是我的代码：

    FIRStorageReference *islandRef = [[self class] firebaseStorageReference];
    NSURL *localURL = [NSURL fileURLWithPath:DocumentPath(kFIREBASE_STORAGE_NAME)];
    __weak typeof(PCMergeHandler*) weakSelf = self;
    self.storageTask = [islandRef writeToFile:localURL completion:^(NSURL *URL, NSError *error){

    }];

任何提供的帮助将不胜感激。