Can't see the AppLoading screen

#1

My AppLoading screen is white blank.

Here is snippet of my Login Page.

import { AppLoading } from 'expo';

class AuthScreen extends Component {

    ...
 
  render() {
    if(!this.state.isLoading) {
      return <AppLoading />;
    }

app.json file

    "loading": {
      "icon": "./assets/icons/loading-icon.png",
      "hideExponentText": false,
      "backgroundColor": "#2773b5"
    },