Code does not compile with AS 3.5.1 about android-kotlin-fundamentals-apps HOT 2 CLOSED

package com.example.colormyviews

import android.graphics.Color
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Button
import android.widget.TextView

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Make a call to the setListeners function
        setListeners()
    }

    /**
     * Attaches listeners to all the views.
     */
    private fun setListeners() {
        // Get a reference for each TextView
        val boxOneText = findViewById<TextView>(R.id.box_one_text)
        val boxTwoText = findViewById<TextView>(R.id.box_two_text)
        val boxThreeText = findViewById<TextView>(R.id.box_three_text)
        val boxFourText = findViewById<TextView>(R.id.box_four_text)
        val boxFiveText = findViewById<TextView>(R.id.box_five_text)

        // Get a reference to Constraint Layout as defined in activity_main.xml
        val rootConstraintLayout = findViewById<View>(R.id.constraint_layout)

        // Get a reference to the buttons
        val redButton = findViewById<Button>(R.id.red_button)
        val greenButton = findViewById<Button>(R.id.green_button)
        val yellowButton = findViewById<Button>(R.id.yellow_button)

        // Make a list of views
        val clickableViews: List<View> = listOf(boxOneText, boxTwoText, boxThreeText, boxFourText, boxFiveText, rootConstraintLayout, redButton, greenButton, yellowButton)

        for (item in clickableViews) {
            item.setOnClickListener { makeColored(it) }
        }
    }

    /**
     * Sets the background color of a view depending on it's resource id.
     * This is a way of using one click handler to do similar operations on a
     * group of views.
     */
    private fun makeColored(view: View) {
        when (view.id) {
            // Boxes using Color class colors for the background
            R.id.box_one_text -> view.setBackgroundColor(Color.DKGRAY)
            R.id.box_two_text -> view.setBackgroundColor(Color.GRAY)
            R.id.box_three_text -> view.setBackgroundColor(Color.BLUE)
            R.id.box_four_text -> view.setBackgroundColor(Color.MAGENTA)
            R.id.box_five_text -> view.setBackgroundColor(Color.BLUE)

            // Boxes using custom colors for background
            R.id.red_button -> box_three_text.setBackgroundResource(R.color.my_red)
            R.id.yellow_button -> box_four_text.setBackgroundResource(R.color.my_yellow)
            R.id.green_button -> box_five_text.setBackgroundResource(R.color.my_green)

            // Set background color to light gray when background is touched
            else -> view.setBackgroundColor(Color.LTGRAY)
        }
    }
}