google map を　表示したいです viewmap

前提・実現したいこと

現在下記の記事を参考にreact nativeでgoogle mapを表示しようと試みています。
https://dev-yakuza.github.io/react-native/react-native-maps/
https://dev-yakuza.github.io/react-native/react-native-maps/

ですが下記のようなerrorが出ています、、

// react-native run-iosをしました

//ターミナル　
warning: the transform cache was reset.
Loading dependency graph, done.
Error: Unable to resolve module `./index` from ``:

//シュミレータ側
Could not connect to development server.

Ensure the following:
- Node server is running and available on the same network - run 'npm start' from react-native root
- Node server URL is correctly set in AppDelegate
- WiFi is enabled and connected to the same network as the Node Server

URL: http://localhost:8081/index.bundle?platform=ios&dev=true&minify=false

RCTFatal
__28-[RCTCxxBridge handleError:]_block_invoke
_dispatch_call_block_and_release
_dispatch_client_callout
_dispatch_main_queue_callback_4CF
__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
__CFRunLoopRun
CFRunLoopRunSpecific
GSEventRunModal
UIApplicationMain
main
start
0x0

該当のソースコード

// index.web.js

import React from 'react';
import App from './src/App';
import {AppRegistry} from 'react-native';

AppRegistry.registerComponent('App', () => App);

AppRegistry.runApplication('App', {
  rootTag: document.getElementById('root'),
});

// ./src/App.js

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 *
 * @format
 * @flow
 */

import React from 'react';
import {
  StyleSheet,
} from 'react-native';

import {
  Container,
} from 'react-native/Libraries/NewAppScreen';
import MapView, {PROVIDER_GOOGLE} from 'react-native-maps';

const App = () => {
  return (
    <>
      <Container>
        <MapView style={styles.MapView} provider={PROVIDER_GOOGLE} />
      </Container>
    </>
  );
};

const styles = StyleSheet.create({
  MapView: {
    flex: 1,
  },
});

export default App;

// packge.json
{
  "name": "AppMap",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "start": "react-native start",
    "test": "jest",
    "lint": "eslint ."
  },
  "dependencies": {
    "react": "^16.12.0",
    "react-dom": "^16.12.0",
    "react-native": "0.61.5",
    "react-native-maps": "^0.26.1",
    "react-native-web": "^0.12.1"
  },
  "devDependencies": {
    "@babel/core": "^7.8.4",
    "@babel/runtime": "^7.8.4",
    "@react-native-community/eslint-config": "^0.0.7",
    "babel-jest": "^25.1.0",
    "babel-plugin-react-native-web": "^0.12.1",
    "eslint": "^6.8.0",
    "jest": "^25.1.0",
    "metro-react-native-babel-preset": "^0.58.0",
    "react-test-renderer": "16.9.0"
  },
  "jest": {
    "preset": "react-native"
  }
}