Ok, it seems the appropriate class is missing from the <i> elements in your site html. For eg.
On the demo site this is what being used
but on your site
so the “fa-” is missing from your site html before the item name (wrench in this case). If you can provide the site login details, then I can have a look around and figure out why this is happening. I will get back to you with the form submission url where you can submit your login details.