terminating with uncaught exception of type NSException というエラーについて

タイマーのアプリを作っています。コードと関連付けは済まし、いざRunしようとしたところ、StopWatchをスタートするとクラッシュしてしまいました。コンソールに以前も同じメッセージがでたことがあったので今後のためにもご教授ください。

コンソール

swift
1error: module importing failed: invalid token (rlm_lldb.py, line 37)
2  File "temp.py", line 1, in <module>
3
42019-10-08 00:19:35.884479+0900 StopWatch[1748:115558] -[StopWatch.ViewController update]: unrecognized selector sent to instance 0x7f93b7d0aa80
52019-10-08 00:19:35.889023+0900 StopWatch[1748:115558] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[StopWatch.ViewController update]: unrecognized selector sent to instance 0x7f93b7d0aa80'
6*** First throw call stack:
7(
8	0   CoreFoundation                      0x00007fff23b98bde __exceptionPreprocess + 350
9	1   libobjc.A.dylib                     0x00007fff503b5b20 objc_exception_throw + 48
10	2   CoreFoundation                      0x00007fff23bb9704 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
11	3   UIKitCore                           0x00007fff47190773 -[UIResponder doesNotRecognizeSelector:] + 302
12	4   CoreFoundation                      0x00007fff23b9d7bc ___forwarding___ + 1436
13	5   CoreFoundation                      0x00007fff23b9f6c8 _CF_forwarding_prep_0 + 120
14	6   Foundation                          0x00007fff2568cd5b __NSFireTimer + 72
15	7   CoreFoundation                      0x00007fff23afc1e4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
16	8   CoreFoundation                      0x00007fff23afbed2 __CFRunLoopDoTimer + 1026
17	9   CoreFoundation                      0x00007fff23afb52a __CFRunLoopDoTimers + 266
18	10  CoreFoundation                      0x00007fff23af629e __CFRunLoopRun + 2238
19	11  CoreFoundation                      0x00007fff23af56b6 CFRunLoopRunSpecific + 438
20	12  GraphicsServices                    0x00007fff3815cbb0 GSEventRunModal + 65
21	13  UIKitCore                           0x00007fff47162a67 UIApplicationMain + 1621
22	14  StopWatch                           0x00000001002938eb main + 75
23	15  libdyld.dylib                       0x00007fff5123bcf5 start + 1
24	16  ???                                 0x0000000000000001 0x0 + 1
25)
26libc++abi.dylib: terminating with uncaught exception of type NSException
27(lldb) 
28`![イメージ説明](5a90840dd7294048d0e6cecae175c2ee.png)### ViewController
29```swift
30import UIKit
31
32class ViewController: UIViewController {
33    
34    var count: Double = 0.00
35    var timer: Timer!
36
37    @IBOutlet var timerLabel: UILabel!
38    
39    
40    override func viewDidLoad() {
41        super.viewDidLoad()
42   }
43    
44    @IBAction func start() {
45        timer = Timer.scheduledTimer(timeInterval: 0.01, target: self, selector: #selector(UIMenuController.update), userInfo: nil, repeats: true)> 
46    }
47
48    
49    @IBAction func stop() {
50        timer.invalidate()
51    }
52    
53    func update () {
54        count = count + 0.01
55        timerLabel.text = String(format: "%.2f", count)
56    }
57
58}