@MartyH
Try restarting your Roku.
Settings/System/System Restart or Settings/System/Power/System Restart.
If still a no-go, try restarting your network equipment. (modem, router, etc).
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