Just wanted to get back to you and let you know that we're looking into this. Your site is using a Go Daddy Class 2 Certification Authority Root Certificate - G2 certificate which our server apparently can't recognize. We've contacted our hosting tech to install the proper certificate and hopefully that will be done soon.
I'll let you know when things are updated, but again, just wanted to let you know that we didn't miss this post.
Thanks,
Alex