Thanks for adding to this guys. Nice licks all around!
I've tracked down my issue with TZ's link. It turns out that Spectrum/Charter in their infinite wisdom has placed filedn.com on their suspicious sites list. Figured it had to be a network issue as I tried it on three different computers here at home and all were unable to connect. My phone could connect when using Verizon's mobile data, but not when using my home wi-fi.
Finally tracked it to a "service" on my internet account called Safe Shield. It's not configurable from the home end user other than on or off. Turned it off and immediately, TZ's link is back.