Help getting started with Roku devices, including setup, connecting your device to your TV, linking a Roku device to your account at my.roku.com/link, adding channels, subscribing to services, and more.
This happens randomly for some unknown reason. What has worked for many users is to start the setup from the beginning by pressing and holding the reset button for a minimum of 30 seconds, then instead of connecting to your home network connect to some other Internet source, such as a smartphone hotspot. It makes no sense, no idea why it works, for it has worked for many, many people.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.