TypeError: new mui.Styles.ThemeManager() is not a function

[nickzuber]

I have a simple React component here, and when I try to load this code I get an error:

const ThemeManager = new mui.Styles.ThemeManager();
                     ^
TypeError: object is not a function
...

This is the code that I currently have. Can anyone help figure out what might be causing this weird error?

const React = require('react');
const injectTapEventPlugin = require("react-tap-event-plugin");
injectTapEventPlugin();
const mui = require('material-ui');

const List = mui.List;
const ListDivider = mui.ListDivider;
const ListItem = mui.ListItem;
const FontIcon = mui.FontIcon;
const RaisedButton = mui.RaisedButton;

// This line is throwing an error
const ThemeManager = new mui.Styles.ThemeManager();


const SideBar = React.createClass({

  childContextTypes: {
    muiTheme: React.PropTypes.object
  },

  getChildContext: function() {
    return {
      muiTheme: ThemeManager.getCurrentTheme()
    };
  },

  render: function(){

    return(
      <div className='sidebar'>
        <RaisedButton label="Primary" primary={true} />
        <List>
          <ListItem primaryText="Inbox" />
          <ListItem primaryText="Starred" />
          <ListItem primaryText="Sent mail" />
          <ListItem primaryText="Drafts" />
        </List>
        <ListDivider />
        <List>
          <ListItem primaryText="All mail" />
          <ListItem primaryText="Trash" />
          <ListItem primaryText="Spam" />
          <ListItem primaryText="Follow up" />
        </List>
      </div>
    );
  }

});

module.exports.SideBar = SideBar;

[bdefore]

ThemeManager has a new API in 0.12. you no longer use a constructor. see http://material-ui.com/#/customization/themes

[nickzuber]

Okay, thank you for the help! @bdefore

[maksadbek]

I am getting this kind of warnings, elements are stopped working(onClick)

Warning: owner-based and parent-based contexts differ (values: `undefined` vs `[object Object]`) for key (muiTheme) while mounting IconButton (see: http://fb.me/react-context-by-parent)

[alitaheri]

Seems like this issue is resolved.