Help configuring Roku device settings, using Roku OS features such as screen mirroring, adjusting display type and audio settings, using Guest Mode, and assistance with software updates.
So you have done a system update, you have also restarted the Roku, you also have cleared the cache completely, and you have unplugged completely the Roku for about one minute and then plugged it back in, and it still does this ?
Try choosing any other free screensaver and seeing if any of them work maybe ?
