Unresolved reference: delayMillis 라는 에러가 나네요

Android Studio Flamingo | 2022.2.1 Patch 2

위가 현재 사용중인 안드로이드스튜디오의 버젼입니다

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.os.Handler
import androidx.activity.result.contract.ActivityResultContracts
import kotlinx.coroutines.delay

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

        Handler().postDelayed({
            startActivity(Intent(this, MainActivity::class.java))
            finish()
        }, delayMillis: 3000)
    }
}