В чом проблема отправки запроса

код:

val url = URL("https://api.exchangerate.host/latest").openConnection()
            BufferedReader(InputStreamReader(url.getInputStream())).use { inp ->
                var line: String?
                while (inp.readLine().also { line = it } != null) {
                    println(line)
                }
            }

ошибка:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.converter/com.example.converter.MainActivity}: android.os.NetworkOnMainThreadException