ios – AVFoundationErrorDomain Code=-11800 “The operation couldn’t be accomplished”

I’m making an attempt to trim a video from pictures app. Under is my code. The error appears to be on exportSession.exportAsynchronously which i’m not capable of perceive why

import UIKit
import AVFoundation
import AVKit
import Photographs
import PhotosUI

class ViewController: UIViewController, PHPickerViewControllerDelegate {
    
    func loadVideo(url: URL) -> AVAsset? {
        return AVAsset(url: url)
    }
    
    func trimVideo(asset: AVAsset, startTime: CMTime, endTime: CMTime, completion: @escaping (URL?, Error?) -> Void) {
        // Create an export session with the specified output URL and preset.
        guard let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetHighestQuality) else {
            completion(nil, NSError(area: "com.yourapp.trimVideo", code: 1, userInfo: [NSLocalizedDescriptionKey: "Failed to create AVAssetExportSession."]))
            return
        }
        
        let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
        let outputURL = documentsDirectory.appendingPathComponent("trimmedVideo.mp4")
        
        // Take away the prevailing file if it exists
        strive? FileManager.default.removeItem(at: outputURL)
        
        exportSession.outputURL = outputURL
        exportSession.outputFileType = AVFileType.mp4
        exportSession.shouldOptimizeForNetworkUse = true
        
        // Set the time vary for trimming
        let timeRange = CMTimeRangeFromTimeToTime(begin: startTime, finish: endTime)
        exportSession.timeRange = timeRange
        
        // Carry out the export
        exportSession.exportAsynchronously {
            swap exportSession.standing {
            case .accomplished:
                completion(exportSession.outputURL, nil)
            case .failed:
                completion(nil, exportSession.error)
            case .cancelled:
                completion(nil, NSError(area: "com.yourapp.trimVideo", code: 2, userInfo: [NSLocalizedDescriptionKey: "Export cancelled"]))
            default:
                break
            }
        }
    }
    
    
    override func viewDidLoad() {
        tremendous.viewDidLoad()
        // Do any extra setup after loading the view.
    }
    
    func picker(_ picker: PHPickerViewController, didFinishPicking outcomes: [PHPickerResult]) {
        debugPrint("1")
        picker.dismiss(animated: true,completion: nil)
        debugPrint("2")
        guard let supplier = outcomes.first?.itemProvider else { return }
        debugPrint("3")
        if supplier.hasItemConformingToTypeIdentifier(UTType.film.identifier) {
            debugPrint("4")
            supplier.loadItem(forTypeIdentifier: UTType.film.identifier, choices: [:]) { [self] (videoURL, error) in
                debugPrint("5")
                cropVideo(sourceURL1: videoURL as! URL, statTime: 10, endTime: 20)
            }
        }
        
        
        
        
    }
    
    
    
    @IBAction func btnClicked(_ sender: Any) {
        
        var config = PHPickerConfiguration(photoLibrary: .shared())
        config.selectionLimit = 1
        config.filter = .movies
        let vc = PHPickerViewController(configuration: config)
        vc.delegate = self
        current(vc, animated: true)
    }
    
    func cropVideo(sourceURL1: URL, statTime:Float, endTime:Float)
    {
        debugPrint("21")
        let supervisor = FileManager.default
        debugPrint("22")
        guard let documentDirectory = strive? supervisor.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true) else {return}
        debugPrint("23")
        let mediaType = "mp4"
        debugPrint("24")
        if mediaType == UTType.film.identifier || mediaType == "mp4" as String {
            debugPrint("25")
            let asset = AVAsset(url: sourceURL1 as URL)
            let size = Float(asset.period.worth) / Float(asset.period.timescale)
            print("video size: (size) seconds")
            debugPrint("26")
            let begin = statTime
            let finish = endTime
            debugPrint("27")
            var outputURL = documentDirectory.appendingPathComponent("output")
            do {
                debugPrint("28")
                strive supervisor.createDirectory(at: outputURL, withIntermediateDirectories: true, attributes: nil)
                outputURL = outputURL.appendingPathComponent("(UUID().uuidString).(mediaType)")
            }catch let error {
                debugPrint("29")
                print(error)
            }
            
            //Take away present file
            _ = strive? supervisor.removeItem(at: outputURL)
            
            debugPrint("30")
            guard let exportSession = AVAssetExportSession(asset: asset, presetName: AVAssetExportPresetHighestQuality) else {return}
            exportSession.outputURL = outputURL
            exportSession.outputFileType = .mp4
            debugPrint("31")
            let startTime = CMTime(seconds: Double(begin ), preferredTimescale: 1000)
            let endTime = CMTime(seconds: Double(finish ), preferredTimescale: 1000)
            let timeRange = CMTimeRange(begin: startTime, finish: endTime)
            debugPrint("32")
            exportSession.timeRange = timeRange
            exportSession.exportAsynchronously{
                swap exportSession.standing {
                case .accomplished:
                    print("exported at (outputURL)")
                case .failed:
                    print("failed (String(describing: exportSession.error))")
                    
                case .cancelled:
                    print("cancelled (String(describing: exportSession.error))")
                    
                default: break
                }
            }
        }
    } 
}

Under is the whole error

Elective(Error Area=AVFoundationErrorDomain Code=-11800 "The operation couldn't be accomplished" UserInfo={NSUnderlyingError=0x2818544b0 {Error Area=NSOSStatusErrorDomain Code=-16979 "(null)"}, NSLocalizedFailureReason=An unknown error occurred (-16979), NSURL=file:///personal/var/cellular/Containers/Shared/AppGroup/35D28117-572C-484E-969C-A9515EF42CDF/Filepercent20Providerpercent20Storage/photospicker/model=1&uuid=6C291C6C-F254-44F5-83C2-C15980750530&mode=appropriate&noloc=0.mp4, NSLocalizedDescription=The operation couldn't be accomplished})