How can I solve React Expo Webview Error?

I would like to create mobile app with react expo. I used webview at my app. I wanted to open ads link at webpage with onNavigationStateChange. But after opening ads link, at main app don’t be clickable. Is there anything I missed? Can you give me an idea please? Thank you in advance..

 let webRef:any = React.createRef();

 export default class App extends React.Component {
  
  constructor(props:any) {
    super(props);

    webRef = React.createRef();
    

    this.state = {
      canGoBack: false,
       url: '***'
    }
  }
 
  
  render() { 
      return (
        <View id='main'>
          <View>
          <WebView
              ref={(ref) => webRef.current = ref}
              style={{flex:1}}
              pullToRefreshEnabled={true}
              id='webmain'
              source={{ uri: '***' }}
              onMessage={(event) => {
                console.log('event: ', event)
              }}
            
              onNavigationStateChange={(event) => {
                  if (!event.url.includes('***') && event.canGoBack == true) {
                    console.log(event.canGoBack);
                      webRef?.current.stopLoading();
                      this.setState({
                        canGoBack: event.canGoBack
                      });
                      Linking.openURL(event.url);
                  }
              }}

              />
          </View>
        </View>
              
      );
  }
}