Element type is invalid

[kitsune7]

I get the following error message when I try to run my app:

Element type is invalid: expected a string (for built-in components) or a class/function
(for composite components) but got: object.

Here is the relevant code:

/* index.android.js */
import { AppRegistry } from 'react-native'
import App from './app'

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



/* app/index.js */
import React from 'react'
import { Root } from './config/router'

const App = () => <Root />

export default App



/* package.json */
{
  "name": "Lifey",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest",
    "menu": "adb shell input keyevent KEYCODE_MENU"
  },
  "dependencies": {
    "babel-preset-react-native-stage-0": "^1.0.1",
    "prop-types": "^15.5.10",
    "react": "16.0.0-alpha.12",
    "react-native": "0.46.1",
    "react-native-background-upload": "^3.0.0-beta",
    "react-native-camera": "git+https://github.com/lwansbrough/react-native-camera.git",
    "react-native-fs": "^2.3.3",
    "react-native-video": "^1.0.0",
    "react-navigation": "^1.0.0-beta.11"
  },
  "devDependencies": {
    "babel-jest": "20.0.3",
    "babel-preset-react-native": "1.9.2",
    "jest": "20.0.4",
    "react-test-renderer": "16.0.0-alpha.12"
  },
  "jest": {
    "preset": "react-native"
  }
}

I've tried having babel-preset-react-native-stage-0 under devDependencies instead of dependencies with the same result.

Everything works in I change the line that says import App from './app' in index.android.js to import App from './app/index', but it should be working without having to include index in the import, which is why I'm confused.