How do I solve this error "Argument of ‘#selector’ cannot refer to local function ‘updateTimer()’", trying to make countdown timer in swift 5.1

import UIKit

class ViewController : UIViewController {

let eggTimes = ["Soft": 300, "Medium": 420, "Hard": 720]

var secondsRemaining = 60


@IBAction func hardnessSelected(_ sender: UIButton) {
    
    let hardness = sender.currentTitle!
    
    secondsRemaining = eggTimes[hardness]!
    
    
    
    Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(updateTimer), userInfo: nil, repeats: true)
    
    
    func updateTimer() {
        if secondsRemaining > 0 {
            print("\(secondsRemaining) seconds.")
            secondsRemaining -= 1
        }
    }
    
}

} strong text I am taking this Udemy course where it seems to be working fine but on my system, it is not working at all.

Read more here: https://stackoverflow.com/questions/66336708/how-do-i-solve-this-error-argument-of-selector-cannot-refer-to-local-functio