Unable to progress past instruction 2 on Make a website: 6/8 Supporting content



I've reset the exercise a couple of times, but can't get past part 2.
F12 shows these errors:
SCRIPT5007: Unable to get property 'parentNode' of undefined or null reference
File: relay.js, Line: 1, Column: 158
SCRIPT1014: Invalid character
File: stuff_wrapper.js, Line: 137, Column: 7

No idea what this means so could do with some help.

<!DOCTYPE html>
  <meta charset="utf-8" />

  <link href='https://fonts.googleapis.com/css?family=Roboto:300,400,700' rel='stylesheet' type='text/css'>
  <link rel="stylesheet" type="text/css" href="main.css">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"/>

  <header class="container">
    <div class="row">
      <h1 class="col-sm-8">Skillfair</h1>
      <nav class="col-sm-4">
  <section class="jumbotron">
    <div class="container">
      <div class="row text-center">
        <h2>Homemade Goods</h2>
        <h3>This Year's Best</h3>
        <a class="btn btn-primary" href="#">See all</a>
  <section class="container">
  	<div class="row">
    <div class="row">


That's a really weird error ! Try removing the dots^
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Thanks for the tip, am now using FireFox and it went through first time. Tried again in IE 11 and was still getting problems.