RPSystemBroadcastPickerView displaying black round circle

I am developing an app which will have an ability to display list of available broadcast extensions. As I gone through Apples doc for the same and implemented in a test application with minimal code as follows:

Code Block 
import UIKit
import ReplayKit
class ViewController: UIViewController {
    @IBOutlet var containerView: UIView!
    override func viewDidLoad() {
        super.viewDidLoad()
        let broadcastPicker = RPSystemBroadcastPickerView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
        containerView.addSubview(broadcastPicker)
        broadcastPicker.showsMicrophoneButton = true
    }
}

But it displays a black round circle only

Anything I missed here? In the test app, I have not implemented anything else.

You can find the complete test app source code here.

iOS device version: 13.6.1
Xcode: 11.3

Here is my stackoverflow post

Kindly Help!

Thanks in advance!