These errors typically occur when the Samsung device is using date or time data that is not matching up with what is expected, but the troubleshooting steps below should help toward resolving the error.
Exit the Hulu app to return to your Samsung's main screen, then re-launch Hulu.
Remove the Samsung device from your Hulu account and then reactivate it with the on-screen code at Hulu.com/activate:
Perform a complete power cycle of your Samsung device, modem, and router by unplugging them from power for at least a minute.
From the main menu on your Samsung device, check your date and time settings by selecting Settings > System > Time zone.
Check your Samsung for a firmware update. From your Samsung Menu > Support > Software Update > Yes.
For specific troubleshooting steps, please refer to your owner's manual or contact Samsung support.