display error of UILabel in tableview swift – Ios swift

I currently have an error displaying my data in a tableview. I managed to display the cells, but there is not the exact number of cells displayed and the data is not displayed in it.
How to display firebase data in UILabel?
Thanks.

struct List {

   var heure: String?
   var date: String?
   var location: String?
   var event: String?
   var title: String?
   var comment: String?
       
       init(heure: String?, date: String?, location: String?, event: String?, title: String?, comment: String?) {
       self.heure = heure
       self.date = date
       self.location = location
       self.event = event
       self.title = title
       self.comment = comment
      }
   }

class FourthViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

@IBOutlet weak var Button: UIButton!
@IBOutlet weak var TableView: UITableView!

var activityList = [List]()
let userID = Auth.auth().currentUser?.uid


override func viewDidLoad() {
    super.viewDidLoad()
    let nib = UINib(nibName: "TableViewCell", bundle: nil)
    TableView.register(nib, forCellReuseIdentifier: "TableViewCell")
    TableView.dataSource = self
    TableView.delegate = self
    TableView.layer.cornerRadius = 20
    fetchActivityList()
    }

func numberOfSections(in tableView: UITableView) -> Int {
    return 1
    }

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return activityList.count
}


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
   let cell = tableView.dequeueReusableCell(withIdentifier: "TableViewCell", for: indexPath) as! TableViewCell

   let test = activityList[indexPath.row]
   cell.Title?.text = test.title
   cell.Heure?.text = test.heure
   cell.Date?.text = test.date
   cell.Location?.text = test.location
   cell.Event?.text = test.event
   cell.Comment?.text = test.comment

   return cell
  }


func fetchActivityList() {

   let ref = Database.database().reference()
   ref.child("Activities").child(userID!).observe(.childAdded, with: { (snapshot) in
               let results = snapshot.value as? [String : AnyObject]
               let titre = results?["Title"]
               let heure = results?["Heure"]
               let date = results?["Date"]
               let location = results?["Location"]
               let event = results?["EventType"]
               let comment = results?["Comment"]
       let myAct = List(heure: heure as! String?, date: date as! String?, location: location as! String?, event: event as! String?, title: titre as! String?, comment: comment as! String?)
               self.activityList.append(myAct)
               DispatchQueue.main.async {
                   self.TableView!.reloadData()
               }
          })
       }
   }

cell
tableview