So my Last.fm records plugin that is built-in or implemented with this amazing theme broke after I upgraded it, so I checked and it seems the whole plugin is now using jQuery. I have had to do some modifications to make it work, I hope this helps.

FIrst, you need to add this in your wp-content/themes/absynthe/header.php right after <![endif]-->.

<script type='text/javascript' src='/wp-includes/js/jquery/jquery.js'></script>

After that, you need to edit wp-content/themes/absynthe/footer.php and replace this:

if (function_exists('lastfmrecords_display')) {
lastfmrecords_display();
}
?>

By this:

<div id="lastfmrecords"></div>

Once you’ve made those changes, go to Settings > Last.fm Records, make sure that the CSS is disabled else it won’t look pretty and make sure the placeholder is set to “lastfmrecords”.

Enjoy

I will let the developer of this theme know so he can fix this too.