TV never connects to Netflix; hangs on "Accessing Netflix" message.

My TV (3rd Generation, software version 7.1) started doing this about a month ago. It's the same cycle every time: Go to Netflix, device hangs on the "Accessing Netflix" progress loop and eventually times out and says "Netflix is currently unavailable. Try again later." The weird thing about this is that every single other streaming service I have (HBOGO, Showtime Anytime, PBS, FXNOW, CNN go, etc.) all work with no issue whatsoever. I can also watch Netflix on both of my computers (24" iMac Early 2008 and 13" MacBook Air 2013) so I don't think the issue is on Netflix's end.

After some Google-fu, I found this thread here which suggested that the best fix was to restore the device to its factory settings and, despite my reluctance to do this, I went ahead and did it anyway. The device downloaded the latest update, set itself to default settings and started everything from scratch but still had the same problem. I set all my streaming services back onto the device and tested each one without so much as a hiccup, but Netflix is the only one that still doesn't even start completely, let alone actually stream anything. Is there anything that I'm doing wrong? I love watching Netflix on my living room TV and it's a shame that, if it weren't for the rest of my streaming services, this box would essentially be a lightweight brick in my living room. Thank you all in advance for your time.