Hi. Thanks for the reply. It is reassuring to know that the Roku device is still compatible with HULU but I am quite sure the issue is not with the network. I tested network connection on the Roku and it is Good (and as mentioned other streaming channels work fine) and other devices (laptop, phone) connected to the Wifi network have no issues. I did restart the Roku as part of suggested fix but that does not help. I do note when I restart the Roku it takes awhile to come up so maybe it is getting end of life although I am not sure why only 1 streaming channel (HULU) would be affected.
Aside from the recommended rebooting of your modem/router/gateway:
1) Check for updates: Settings/System/System updates/Check now - try again
2) Change your Theme to the Roku Default: Settings/Theme/Restore default theme - try again
3) Change your Screensaver to a Roku clock: Settings/Theme/Screensavers - try again
4) Network connection reset: Settings/System/Advanced system settings/Network connection reset - try again
5) Completely unplug power from Roku for 10-15 minutes - try again
6) Factory reset: Settings/System/Advanced system settings/Factory reset <--- last resort
