Try using the included power adapter and plug into a wall outlet rather than the TV USB port if so doing currently. If the power port on a TV is underpowered, it can cause wonky behavior with the Roku devices.
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
That could mean that the software update did not complete successfully.
When the setup fails to complete after the software update runs, here are a couple of things that some people have found to work for them. They may not be universally successful, but they are worth a try.
Easiest to try, so try this first: Restart your router, even if other devices have no trouble connecting. When your router has completed its startup, try repeating your Roku setup.
More involved: Repeat the setup by connecting to a different WiFi network - perhaps via a WiFi hotspot on your mobile phone or by taking it to a friend's house - and see if it will complete the startup. If successful, then redo the WiFi connection to use your intended WiFi network via Settings > Network > Set up connection.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X