Linking an Image using URL option will not Save, Suggestions on how to fix?

Hi Support,

I am trying to link a "like us on Facebook" image in the footer of the site, http://garnerexteriors.net but I'm unable to get the URL of the page to save to the image.

The URL I'm using is this: https://www.facebook.com/pages/Garner-Exteriors/500692920009554

It's a public page for their business.

I'll post some follow up screenshots to show you what I'm doing so you can help me troubleshoot. I've also granted access to the site just in case you need to take a closer look.

Thanks,
Martiel