Uncaught TypeError Occur when click to choose datetime

[thanglv2]

Hi guys, have a Error occur when i click to choose datetime: "Uncaught TypeError: _this.refs.dtpbutton.getBoundingClientRect is not a function", and i don't know why because my code is so simple, pls help me fix this problem @@

`import DateTimeField from "react-bootstrap-datetimepicker";
var Test = React.createClass({render: function() {
return ( );
}
});

export default Test;
`