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I'm trying to use Bluetooth in a SwiftUI on Playgrounds. I have a running sample using UIKit, but with SwiftUI, I ran into an interesting problem. I startet with the empty App-Sample and defined the ContentView like this: import SwiftUI struct ContentView: View {     var body: some View {         VStack {             Text("Hello, world!")             Button {                 print("hello")             } label: {                 Text("press me")             }.buttonStyle(.bordered)         }     } } The MyApp-code looks like this import SwiftUI import PlaygroundSupport import PlaygroundBluetooth @main struct MyApp: App {     //private var centralManager: PlaygroundBluetoothCentralManager?     var body: some Scene {         WindowGroup {             ContentView()         }     } } With this implementation, I can click on the Button and it prints the message. But if I uncomment the private var centralManager, the App does not run anymore. Any ideas? Thanks in advance Rainer