Nvariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: object. Check the render method of `Headers`

Headers.jsx

import React, {Component} from ‘react’;
import Accounts from ‘./accounts’;

class Headers extends Component {
render(){
return(


Markbin



);
};
}

export default Headers;
Accounts.jsx

import React, {Component} from ‘react’;
import ReactDOM from ‘react’;
import {Template} from ‘meteor/templating’;
import {Blaze} from ‘meteor/blaze’;
class Accounts extends Component {

componentDidMount(){
    //Render Blaze accounts form and find the div we just rendered in the 'render' method and place the blaze accounts form in that div
    this.view = Blaze.render(Template.loginButtons,
                 ReactDOM.findDOMNode(this.refs.container));
}

componentWillUnmount(){
    // find forms we created and destroy them. We need to clean up those forms ourselves
    Blaze.remove(this.view);
}

render(){
    return(
        <div ref="container"></div>
    );
}

}