"Not enough information to infer parameter T" with Kotlin and Android

I'm trying to replicate the following ListView in my Android app using Kotlin:

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.

Unfortunately I'm getting an error I'm unable to resolve myself.
Here's my code:

MainActivity.kt:

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

val listView = findViewById(R.id.list) as ListView
listView.adapter = ListExampleAdapter(this)
}

private class ListExampleAdapter(context: Context) : BaseAdapter() {
internal var sList = arrayOf("Eins", "Zwei", "Drei")
private val mInflator: LayoutInflater

init {
this.mInflator = LayoutInflater.from(context)
}

override fun getCount(): Int {
return sList.size
}

override fun getItem(position: Int): Any {
return sList[position]
}

override fun getItemId(position: Int): Long {
return position.toLong()
}

override fun getView(position: Int, convertView: View?, parent: ViewGroup): View? {
val view: View?
val vh: ListRowHolder

if(convertView == null) {
view = this.mInflator.inflate(R.layout.list_row, parent, false)
vh = ListRowHolder(view)
view.tag = vh
} else {
view = convertView
vh = view.tag as ListRowHolder
}

vh.label.text = sList[position]
return view
}
}

private class ListRowHolder(row: View?) {
public val label: TextView

init {
this.label = row?.findViewById(R.id.label) as TextView
}
}
}

The layouts are exactly as here:

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The full error message I'm getting is this:
**Error:(92, 31) Type inference failed: Not enough information to infer parameter T in fun <T : View!> findViewById(p0: Int): T!
Please specify it explicitly.**

I'd appreciate any help I can get.