Error in React Native: cli.js returns the following

Bundling `index.android.js`  [development, non-minified, hmr disabled]  96.1% (296/302), failed.
error: bundling failed: "Unable to resolve module `react-native-router-flux` from `C:\\xampp\\htdocs\\reactProject\\src\\App.js`: Module does not exist in the module map\n\nThis might be related to https://github.com/facebook/react-native/issues/4968\nTo resolve try the following:\n  1. Clear watchman watches: `watchman watch-del-all`.\n  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.\n  3. Reset packager cache: `rm -fr $TMPDIR/react-*` or `npm start -- --reset-cache`."

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

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View
} from 'react-native';

import App from './src/App.js'

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});

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