HELP – Social Icons no longer displaying on my production site

Hi

I just checked my website this morning and noticed that my social icons not longer display on my landing page. If I reload the page I see them flash then disappear and never display. I see the tooltips for them.

I tested in my staging area as follows:
deactivated all plugins: the problem is still there
swtich theme: that did not help as all I see are shortcodes

I have included my staging login credentials so you can have a look.

You can find the website on the staging area here (select the Blog menu option to see the issue):
http://crescendo.staging.wpengine.com/#social (hosted on WPengine)

I have left all of the plugins deactivated but reactivated my Enfold theme.

Thanks
Lyse