Help by Swift Playground App

I would like to program an app in Swift Playground that displays WhatsApp Web in a webview, so to speak. But I keep seeing an error like in the screenshot.

My Code:

import SwiftUI import WebKit import PlaygroundSupport

struct WebView: UIViewRepresentable { let url: URL

func makeUIView(context: Context) -> WKWebView {
    let webView = WKWebView()
    let request = URLRequest(url: url)
    webView.load(request)
    return webView
}

func updateUIView(_ webView: WKWebView, context: Context) {
}

}

struct ContentView: View { var body: some View { WebView(url: URL(string: "https://web.whatsapp.com")!) .edgesIgnoringSafeArea(.all) } }

PlaygroundPage.current.setLiveView(ContentView())