React Hot Reloader 3

Question

I'm trying the new React Hot Loader 3 and I'm receiving an warning message:

warning.js:44 Warning: React.createElement: type should not be null, undefined, boolean, or number. It should be a string (for DOM elements) or a ReactClass (for composite components). Check the render method of AppContainer .

This is the App file. What is wrong?
Ps: It's written the same way as on examples.
Ps2: The problem is not in the App since it renders on the render() outside the if statement
Ps3: The warning only appears when the browser tries to 'hot-reload' (when I make changes to any file)

import React from 'react';
import { render } from 'react-dom';
import { AppContainer } from 'react-hot-loader';
import a11y  from 'react-a11y'
import Store from './stores/Store';
import App from './components/App/App';

const store = new Store();

if(process.env.NODE_ENV === 'development'){
  a11y(React);
}

render(
  <AppContainer
    component={App}
    props={{ store }}
  />,
  document.getElementById('root')
);

if (module.hot) {
  module.hot.accept('./components/App/App', () => {
    render(
      <AppContainer
        component={require('./components/App/App').default}
        props={{ store }}
      />,
      document.getElementById('root')
    );
  });
}

Answer 1

Ok, the problem was with my .babelrc file. I had some other plugins, that I've removed, and it worked:

{
  "presets": ["es2015-loose", "react", "stage-1"],

  "plugins": [
    "react-hot-loader/babel",
    "transform-decorators-legacy"
  ],
}