To troubleshoot, so far I've:
1. Confirmed the network setup is correct, and that everything else on the TV can access the LAN & WAN successfully; I've also reserved an IP address for the VT50.
2. Confirmed the Netflix app on three other devices, which are on the same LAN, can connect to the service without issue.
3. Deactivated the Netflix app on the VT50 numerous times using the Up, Up, Down, Down, etc. sequence.
4. Factory reset the VT50.
5. Connected the TV via wired connection instead of wireless.
So far nothing has worked to fix this problem; I get the message that the app can't connect to the service almost immediately after starting it up, so haven't even been able to try and re-register the VT50 with Netflix. The error message I see when I go to the deactivation screen is: "NBP / 1 / Unable to connect to functioning local backend /".
Has anyone had this issue and fixed it? Any other recommendations or guidance would be great.