From the page source it seems as if the settings initializer script is missing for some reason. Can you please try changing this option to see if that helps?
Okay – Now at least I can see the settings element on the page, but there are no filters in it.
Can you please check if you have any filters added? Try adding a few for testing to see if that works. Currently there is nothing within the filter section on the front-end, so it seems as if it was invisible.