Is it saying the *Roku* itself will stop working? Or is it saying that Netflix will stop working on your Roku?
Just asking because there are articles around the internet saying that for some earlier models of Roku (generations 1 and 2, from 2011 or earlier), Netflix isn't going to work any longer. If someone's Netflix can be set to auto-play the next episode of a tv series, it's still good.
At any rate, it would be helpful to someone answering you in a more official or just more knowledgeable capacity if you'd edit your post with which model/version Roku you have.
Home Button>Settings>System>About>Right Arrow
From there you can see your model number, and the software version number might be helpful also.
Roku 4230x - 1080HD//SonyBravia55 TV-4K//Ethernet Favorite/most used channels:Netflix, Hulu, DC Universe, Disney+, PlutoTV, Criterion, Prime, Starz