Uncaught SyntaxError: embedded: Unexpected token (18:8)

Using Chrome v50.0.2661.102 (64-bit), I installed the server using npm.

I'm on the first step of the tutorial, here's what I have:

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>React Tutorial</title>
    <!-- Not present in the tutorial. Just for basic styling. -->
    <link rel="stylesheet" href="css/base.css" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.1/react-dom.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.6.16/browser.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/remarkable/1.6.2/remarkable.min.js"></script>
  </head>
  <body>

    <div id="content"></div>

    <script type="text/babel">

      var CommentBox = React.createClass({
        render: function() {
          return (
            <div className="commentBox">
              <h1>Comments</h1>
              <CommentList />
              <CommentForm />
              Hello, world! I am a CommentBox.
            </div>
          );
        }
      });

      ReactDOM.render(
        <CommentBox />
        document.getElementById('content')
      );

    </script>
  </body>
</html>

This produces the following error in the console:

browser.js:2027 Uncaught SyntaxError: embedded: Unexpected token (19:8)pp.raise @
browser.js:2027pp.unexpected @ browser.js:2596pp.expect @ browser.js:2590pp.parseExprList @
browser.js:1627pp.parseSubscripts @ browser.js:1124pp.parseSubscripts @ 
browser.js:1113pp.parseExprSubscripts @ browser.js:1099pp.parseMaybeUnary @ 
browser.js:1079pp.parseExprOps @ browser.js:1035pp.parseMaybeConditional @ 
browser.js:1018pp.parseMaybeAssign @ browser.js:986pp.parseExpression @ 
browser.js:961pp.parseStatement @ browser.js:2822(anonymous function) @ 
browser.js:657pp.parseTopLevel @ browser.js:2723parse @ browser.js:1921exports.default @ 
browser.js:8217parse @ browser.js:9097parseCode @ browser.js:9182(anonymous function) @ 
browser.js:13132wrap @ browser.js:9146transform @ browser.js:13130transform.run @ 
browser.js:4613exec @ browser.js:4649runScripts @ browser.js:4680

reactjs / react-tutorial

Uncaught SyntaxError: embedded: Unexpected token (18:8) #142