i'm trying to use MarqueeLabel @IBOutlet weak var liveLabel: MarqueeLabel! override func viewDidLoad() {     super.viewDidLoad() self.liveLabelSetUp() } func liveLabelSetUp() {     // Continuous, with tap to pause     liveLabel.type = .continuousReverse //that's the line of the error     liveLabel.speed = .duration(10)     liveLabel.fadeLength = 10.0     liveLabel.leadingBuffer = 40.0     liveLabel.trailingBuffer = 30.0     liveLabel.isUserInteractionEnabled = true     let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.pauseTap))     tapRecognizer.numberOfTapsRequired = 1     tapRecognizer.numberOfTouchesRequired = 1     liveLabel.addGestureRecognizer(tapRecognizer)   }       @objc func pauseTap(_ recognizer: UIGestureRecognizer) {     let continuousLabel2 = recognizer.view as! MarqueeLabel     if recognizer.state == .ended {       continuousLabel2.isPaused ? continuousLabel2.unpauseLabel() : continuousLabel2.pauseLabel()     }   } Error code : Thread 1: EXC_BAD_INSTRUCTION (code=1, subcode=0x0)