React Component wont render in Codepen - reactjs

Question

I have a simple radio button group component on codepen here that is not rendering in codepen. I want to post this to the code review stackexchange, since it is one of the first components i've built and will be necessary in many places on a web app I am building. However for that post, I want my codepen example to be working.
I think I am probably breaking some rule about how to use es6 in react to get the app to render, but I am struggling to debug. My console.logs() are not helping, and the error messages in codepen arent helping a ton either.
Since I linked to my codepen, I have to accompany it with code, so here's what I have in my codepen at the moment:
import React, { Component } from 'react';
import { ToggleButton, ToggleButtonGroup } from 'react-bootstrap';
class ToolButtonGroup extends Component {
constructor(props) {
super(props);
};
render() {
// Get Variables from the params prop
const { header, buttons, initialVal } = this.props.params;
const { borderRadius, margin, padding, fontsize, border } = this.props.params;
const { gridID, gridColumns, minRowHeight } = this.props.params;
// Create the individual buttons
const pageButtons = buttons.map((buttoninfo, idx) => {
return (
<ToggleButton
key={idx}
style={{
"borderRadius": borderRadius,
"margin": margin,
"padding": padding,
"fontSize": fontsize,
"border": border
}}
bsSize="large"
value={buttoninfo.value}>
{buttoninfo.label}
</ToggleButton>
)
})
// Return the button group
return(
<div
style={{"border": "1px solid red" }}
id={gridID}>
<h2 style={{
"width": "100%",
"margin": "0 auto",
"fontSize": "1.75em",
"marginTop": "5px",
"border": "none"
}}
>{header}</h2>
<ToggleButtonGroup
type="radio"
name="charttype-options"
defaultValue={initialVal}
onChange={this.props.handler}
style={{
"display": "grid",
"gridTemplateColumns": "repeat(" + gridColumns + ", 1fr)",
"gridAutoRows": "auto",
"gridGap": "8px"
}}
>
{pageButtons}
</ToggleButtonGroup>
</div>
)
}
}
class StarterApp extends Component {
constructor(props){
super(props);
this.state = {
pitchersOrHitters: "",
position: ""
}
}
// Button and Select Handlers!
handlePitchHitChange = (pitchersOrHitters) => {
this.setState({pitchersOrHitters})
}
handlePositionChange = (position) => {
this.setState({ position: position });
}
render() {
console.log("A")
// 0. Load State and Props
const { pitchersOrHitters, position } = this.state;
// Pitcher or Hitter Radio Button Group params
const pitchOrHitButtonGroup = {
borderRadius: "25px",
margin: "1% 10%",
padding: "5%",
fontsize: "2em",
border: "2px solid #BBB",
gridColumns: 1, minRowHeight: "10px", "gridID": "buttons1",
header: "Choose One:",
buttons: [
{ value: "Pitchers", label: "Pitchers" },
{ value: "Hitters", label: "Hitters" },
],
initialVal: "Pitchers"}
// Pitcher or Hitter Radio Button Group params
const positionButtonGroup = {
borderRadius: "10px",
margin: "1% 10%",
padding: "5%",
fontsize: "1.25em",
border: "2px solid #BBB",
gridColumns: 4, minRowHeight: "20px", "gridID": "buttons2",
header: "Choose One:",
buttons: [
{ value: "SP", label: "SP" },
{ value: "RP", label: "RP" },
{ value: "1B", label: "1B" },
{ value: "2B", label: "2B" },
{ value: "SS", label: "SS" },
{ value: "3B", label: "3B" },
{ value: "LF", label: "LF" },
{ value: "RF", label: "RF" },
{ value: "CF", label: "CF" }
],
initialVal: "SP"}
return(
<div className="chart-grid-container">
<ToolButtonGroup
params={pitchOrHitButtonGroup}
value={pitchersOrHitters}
handler={this.handlePitchHitChange} />
<ToolButtonGroup
params={positionButtonGroup}
value={position}
handler={this.handlePositionChange} />
</div>
)
}
}
ReactDOM.render(
<StarterApp />,
document.getElementById('root')
);
.chart-grid-container {
display: grid;
grid-template-columns: repeat(12, 1fr);
grid-auto-rows: minmax(200px, auto);
grid-gap: 5px;
grid-template-areas:
"btns1 btns1 btns2 btns2 btns2 btns2 . . . . . .";
}
#buttons1 { grid-area: btns1; }
#buttons2 { grid-area: btns2; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react-dom.min.js"></script>
<div id='root'>
COME ON WORK!
</div>
Im unsurprisingly struggling to get this code snippet working as well. Although in this case, it is because I don't know how to include react-bootstrap, which is something I've already done in my codepen.
Thanks!

Answer 1

I noticed I got the errors when using import statements on that specific project.
This is probably a limitation of transpiling engine on the codepen. Better if you use some platform (ie: enter link description here) that already has all of these solved out for you.
Here is your code on codesandbox.