Product Filter is not showing any data after recent update

Hi,

I believe this started after the most recent update as my staging site which was updated a few weeks ago does not have the same issue. The filter displays, but the attributes do not load in to the filter which means that no selections can be made. The only things showing are the price slider, and the ‘filter’ and ‘clear’ buttons, none of the category specific attributes.

Any advice is appreciated, thanks

The page I need help with: [log in to see the link]