Also, Make sure the time zone and region settings are correct.
Check and make sure you have a stable working internet connection as an unstable internet connection may cause the problem of communicating with Netflix server.
Make sure you have the latest Windows Updates, and Video Drivers installed on your PC.
If you notice no sound or black screen while running the Netflix app, Restart the app is probably a good solution.
If you are also struggling for similar problems, Netflix app not loading or crashes, Here apply solutions below.