My App does not read my json file

Hi everyone! Here I have a new problem: My application compiles but unfortunately, I can't open the files contained in the json file. My indexViewController file doesn't display it.

Here is the link of my json file: https://drive.google.com/file/d/1qMKLNcf1fvYla21Yhh_D36FuPI-0-kj2/view?usp=drivesdk

and my Index file : https://drive.google.com/file/d/169H5w6WvqAE43B4VceXqvSrHJXJUzE8Y/view?usp=sharing

and here is the code of my indexviewcontroller :

    
    @IBOutlet weak var indexTableView: UITableView!
    @IBOutlet weak var bookmarkButton: UIBarButtonItem!
    
    // The BookViewModel init method decodes the json file and sets the chapters property on this instance
    var book: BookViewModel = BookViewModel()
    var chapters: [ChapterViewModel] = [ChapterViewModel]()
    var managedObjectContext: NSManagedObjectContext!
    
    var hasUserTappedOnBookmarkWidget: Bool = false
    
    let searchController = UISearchController(searchResultsController: nil)
    var filteredChapters: [ChapterViewModel] = [ChapterViewModel]()
    var chapNumberAndSearchTextRangeList: [Int: [ChapterViewModel]] = [Int: [ChapterViewModel]]()
    var searching = false
    lazy var workItem = WorkItem()
    
    private var userClickedChapter: ChapterViewModel?
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        chapters = book.chapters
        setNavBarLargeTitleProperty()
        
        // This makes the table view row animate its selection state as it pops and pushes on the navigation stack.
        if let selectedIndex = indexTableView.indexPathForSelectedRow {
            
            let coordinator = self.transitionCoordinator
 
            if coordinator != nil {
                coordinator?.animate(alongsideTransition: { (context) in
                    self.indexTableView.deselectRow(at: selectedIndex, animated: true)
 
                }, completion: { (context) in
 
                    if context.isCancelled {
                        self.indexTableView.selectRow(at: selectedIndex, animated: false, scrollPosition: .none)
                    } else {
                        self.indexTableView.deselectRow(at: selectedIndex, animated: true)
                    }
                })
            } else {
                self.indexTableView.deselectRow(at: selectedIndex, animated: true)
            }
        }
        
        // if the user has tapped on the widget, navigate to BookmarkViewController directly
        if hasUserTappedOnBookmarkWidget {
            performSegue(withIdentifier: "goToBookmarks", sender: self)
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Set the datasource and delegate as self
        indexTableView.dataSource = self
        indexTableView.delegate = self
        
        indexTableView.register(UINib(nibName: "IndexCell", bundle: nil), forCellReuseIdentifier: "customIndexCell")