wishinghand
commented
4 years ago I know this is super old but that's because the page has a script tag that references a dist folder that is no longer there. Replace the the line that looks like this:
<script type="text/javascript" src="../dist/index.min.js"></script>
With this:
<script type="text/javascript" src="https://unpkg.com/vue-introjs@1.3.0/dist/index.min.js"></script>
(Y)