TableViewCellにThread 1: signal SIGABRTのエラーが、、、

ビルドした際に、TableViewCellにThread 1: signal SIGABRTのエラーが発生してしまいます。。。
一応、本当にエラーの原因がTableViewCellなのか、ブレイクポイントで確認したところ、
TableViewCellが原因のようです。

試したこと

・MainStoryBoardの接続不良を疑い、接続されている全てのUI部品を確認しましたが、正常。

・対象のインスペクターの確認するが、storyboardとViewControllerの値は一致。

・フォルダーをクリーンにし、実行するが、エラーは治らず。

swift
1コードclass chatViewController: UIViewController {
2    
3    private let cellId = "cellId"
4    
5    private var users = [User]()
6    
7    
8    @IBOutlet weak var chatTableView: UITableView!
9    
10    override func viewDidLoad() {
11        super.viewDidLoad()
12        
13        
14        chatTableView.delegate = self
15        chatTableView.dataSource = self
16        
17        navigationController?.navigationBar.barTintColor = .rgb(red: 0, green: 106, blue: 182)
18        navigationItem.title = "あなたについて"
19        navigationController?.navigationBar.titleTextAttributes = [.foregroundColor: UIColor.white]
20        
21       
22        let rightBarButton = UIBarButtonItem(title: "追加", style: .plain, target: self, action: #selector(tappedNavRightBarButton))
23        navigationItem.rightBarButtonItem = rightBarButton
24        navigationItem.rightBarButtonItem?.tintColor = .white
25        
26        if Auth.auth().currentUser?.uid == nil {
27        
28        let storyboar = UIStoryboard(name: "Main", bundle: nil)
29        let loginViewController = storyboar.instantiateViewController(withIdentifier: "loginViewController") as! loginViewController
30        loginViewController.modalPresentationStyle = .fullScreen
31        self.present(loginViewController, animated: true, completion: nil)
32        
33        }
34    
35    }
36    override func viewWillAppear(_ animated: Bool) {
37        super.viewWillAppear(animated)
38             fetchUserInfoFromFirestore()
39    }
40    @objc func tappedNavRightBarButton() {
41        let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
42        let loginViewController = storyboard.instantiateViewController(withIdentifier: "loginViewController") as! loginViewController
43        self.present(loginViewController, animated: true, completion: nil)
44    }
45    
46     private func fetchUserInfoFromFirestore() {
47            Firestore.firestore().collection("users").getDocuments{ (snapshots, err) in
48                if let err = err {
49                    print("user情報の取得に失敗しました(err)")
50                    return
51                }
52                snapshots?.documents.forEach({ (snapshot) in
53                    let dic = snapshot.data()
54                    let user = User.init(dic: dic)
55                    
56                    self.users.append(user)
57                    self.chatTableView.reloadData()
58                    self.users.forEach { (user) in
59                        print("user.username: ", user.username)
60                        
61                    }
62                    
63                })
64        }
65    }
66    
67}
68   
69extension chatViewController: UITableViewDelegate, UITableViewDataSource {
70    
71    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
72        return 80
73    }
74    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
75        return users.count
76    }
77    
78    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
79        let cell = chatTableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath)
80        as! ChatTableViewCell
81        cell.user = users[indexPath.row]
82        return cell
83    }
84    
85    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
86        print("tap table view")
87        let storyboard = UIStoryboard.init(name: "ChatRoom", bundle: nil)
88        let ChatRoomViewController = storyboard.instantiateViewController(withIdentifier: "ChatRoomViewController")
89        navigationController?.pushViewController(ChatRoomViewController, animated: true)
90    }
91    
92    class ChatTableViewCell: UITableViewCell {
93          
94          var user: User? {
95              didSet {
96                 
97                  if let user = user {
98                  
99                      wantlabel.text = user.emailadress
100                      
101                      //userimageview.imege = user?.profileImageUrl
102                  timelabel.text =  timeFormatterFortimelabel(date: user.createdAt.dateValue())
103                      
104                      
105                      
106                  }
107                 
108              }
109          }
110          
111          @IBOutlet weak var timelabel: UILabel!
112          @IBOutlet weak var wantlabel: UILabel!
113          @IBOutlet weak var userimageview: UIImageView!
114          
115      
116          override func awakeFromNib() {
117              super.awakeFromNib()
118              
119              userimageview.layer.cornerRadius = 25
120          }
121          
122          override func setSelected(_ selected: Bool,animated: Bool) {
123              super.setSelected(selected, animated: animated)
124              
125          }
126          
127          private func timeFormatterFortimelabel(date: Date) -> String {
128              let formatter = DateFormatter()
129              formatter.dateStyle = .full
130              formatter.timeStyle = .short
131              formatter.locale = Locale(identifier: "ja_JP")
132              return formatter.string(from: date)
133          }
134          
135      
136      }
137
138}
139
140