title: Possible import error after updating to SDK 33
body: <p>I've upgraded to expo SDK 33 from SDK 32 and I am getting the following error:</p>
  
  <blockquote>
    <p>Warning: React.createElement: type is invalid -- expected a string
    (for built-in components) or a class/function (for composite
    components) but got: %s.%s%s, undefined,  You likely forgot to export
    your component from the file it's defined in, or you might have mixed
    up default and named imports.</p>
    
    <p>Check your code at App.js:117.,</p>
  </blockquote>
  
  <p>My App.js looks like this(simplified)</p>
  
  <pre><code>import React, { Component } from 'react';
  import { Alert, SafeAreaView } from 'react-native';
  import { Root } from "native-base";
  import {
      StackNavigator,
      addNavigationHelpers,
  } from 'react-navigation';
  import {
      createStore,
      applyMiddleware,
      combineReducers,
      compose
  } from 'redux';
  import {
      createReduxBoundAddListener,
      createReactNavigationReduxMiddleware,
  } from 'react-navigation-redux-helpers';
  import { Provider, connect } from 'react-redux';
  import thunk from "redux-thunk";
  
  import {
      moveTo,
      moveBack,
      moveAndResetStack,
      showSupport,
      hideSupport,
      startLoading,
      stopLoading
  } from './src/store/actions/index';
  import { Notifications } from 'expo';
  
  import { StyleProvider } from 'native-base';
  import getTheme from './native-base-theme/components';
  import platform from './native-base-theme/variables/platform';
  
  // reducers
  import routesReducer from './src/store/reducers/routes';
  
  // Global headers
  import AppNavigator from './AppNavigator';
  import { State } from './src/modules/State';
  import events from './src/events/events';
  
  const navReducer = (state,action) =&gt; {
      const newState = AppNavigator.router.getStateForAction(action, state);
      return newState || state;
  }
  
  
  const appReducer = combineReducers({
      ...
  });
  
  const middleware = createReactNavigationReduxMiddleware(
      "root",
      state =&gt; state.nav,
  );
  
  const addListener = createReduxBoundAddListener("root");
  
  
  class App extends Component {
  
      constructor() {
          super();
          this.state = {
              isReady: false,
          }
      }
  
      async componentWillMount()
      {
          this.setState({isReady: true});
  
          Notifications.addListener(this.handleNotification)
      }
  
      handleNotification(notification)
      {
          events.publish('displayNotification', notification);
      }
  
  
      render()
      {
          if (!this.state.isReady) {
              return &lt;Expo.AppLoading /&gt; ;
          }
          return (
              &lt;Root&gt;
                  &lt;StyleProvider style={getTheme(platform)}&gt;
                      &lt;AppNavigator navigation={addNavigationHelpers({
                          dispatch: this.props.dispatch,
                          state: this.props.nav,
                          addListener,
                      })} /&gt;
                  &lt;/StyleProvider&gt;
              &lt;/Root&gt;
          );
      }
  }
  
  
  const mapStateToProps = (state) =&gt; ({
      nav: state.nav
  });
  
  
  const AppWithNavigationState = connect(mapStateToProps, null)(App);
  
  let composeEnhancers = compose;
  
  if (__DEV__) {
      composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
  }
  
  const ww = createWw(appReducer, composeEnhancers(applyMiddleware(thunk, middleware)));
  
  export default class Top extends Component {
      render() {
          return (
              &lt;Provider ww={ww}&gt;
                  &lt;AppWithNavigationState /&gt;
              &lt;/Provider&gt;
          );
      }
  }
  </code></pre>