Safari can't establish a secure connection to the server "www.macys.com"
I'm running OS X El Capitan on Macbook Air and having trouble with one web site - macys.com. Safari is returning error - can't establish a secure connection to the server "www.macys.com". I can get to at least a dozen other sites from this laptop and have no errors reported on any other URLs. I can get to this macys.com site on two iPhones, an iPad and two Windows 10 PCs with no errors. All devices are running on my home wireless network.
Does anyone have ideas on what is wrong with the Mac on this one site - https://www.macys.com ?
Thanks.