Did Roku shut down all streaming at Midnight Central time on 11-6-20? I have 4 Rokus (sticks & ultra) and all 4 of them quit working at the same time. MY INTERNET WORKS FINE AND IT SAYS I'M CONNECTED. I AM ON MY COMPUTER USING THE INTERNET NOW.
With the exception of The Roku Channel, all the channel streams you get on your Roku come from the servers operated by those channels, not from Roku.
All three of my active Rokus are working normally.
If you have a mobile phone with a wifi hotspot, try seeing if you can connect a Roku to the hotspot account to see if that works.
If all your streamers went down at the same time, that suggests a problem at a common point shared by all of them -- which would seem to be your cable modem and router.
This has always worked for me when I've had network connection problems with my Rokus:
If that doesn't fix it, try disconnecting the power to your Roku for a few seconds. When it comes back up, see if you then can set up the network connection.