Can't make it work - Githubissues

UPDATE: I have updated and restarted firefox and all working... No idea waht it was

Hi! I just cloned the repo and copied files. However it does not work, just shows images as there no any gallery.

<!doctype html>

<html lang="en">

<head>
    <meta charset="utf-8">

    <title>Test</title>
    <meta name="description" content="">
    <meta name="author" content="">

    <link rel="stylesheet" href="css/lightgallery.css">

</head>

<body>
    <div id="lightgallery">
        <a href="img/do-truck/_S1A0708 1.png">
            <img src="img/do-truck/_S1A0708 1.png">
        </a>
        <a href="img/do-truck/_S1A0722.png">
            <img src="img/do-truck/_S1A0722.png">
        </a>
    </div>
    <script src="js/lightgallery.min.js"></script>

    <script>
        lightGallery(document.getElementById('lightgallery'), {
            thumbnail: true
        });
    </script>
</body>

</html>

The css and javascript files were cloned from github, the console log is clear in FireFox. I tried it locally and via light-server too.
What did I wrong?

sachinchoolur / lightgallery.js

Can't make it work #113