Swift：将视频上传到Firebase时遇到问题

Question

我正在尝试将视频文件从ios应用上传到Firebase，但出现以下错误消息：

2020-07-01 10：46：22.734237 + 0100 AppName [17646：835206] [core]“从守护程序返回错误：错误Domain = com.apple.accounts代码= 7（空） 2020-07-01 10：46：28.031932 + 0100 AppName [17646：835206]任务<568D30E0-41B3-4ADC-BC14-0E85365B1BAC>。<1>完成，错误为[-1]错误域= NSURLErrorDomain代码= -1“未知错误” 不工作

func convertAssestsToImages() -> Void {
    if selectedAssets.count != 0{
        for i in 0..<selectedAssets.count{
            let manger = PHImageManager.default()
            let optionB = PHVideoRequestOptions()
            let db = Firestore.firestore()
            let pictureID = randomString(length: 12)
            let video_name = "Video\(pictureID)"
            let storageRef = Storage.storage().reference()
           
            optionB.isNetworkAccessAllowed = true
        
            manger.requestAVAsset(forVideo: selectedAssets[i], options: optionB) { (asset: AVAsset?, audioMix: AVAudioMix?, info: [AnyHashable : Any]?) -> Void in
                
                if let urlAsset = asset as? AVURLAsset {
                    //***video upload***
                    let localVideoUrl: URL = urlAsset.url as URL
                    let storeVideo = storageRef.child("NAME1").child(SUB_NAME).child(video_name)
                    let metaData = StorageMetadata()
                    metaData.contentType = "image/jpg"
                    
                    storeVideo.putFile(from: localVideoUrl, metadata: metaData) { (metaData, error) in
                        if error != nil {
                            print("NOT WORKING")
                        }else{
                            print("WORKING")
                        }
                    }
                }
            }
        }
    }
}