The error says, "This application can not be started. This application can only be started by the user who has the license for it."
We're sorry for the inconvenience, but the good news is that this is easily remedied. To get Hulu Plus back up and running, we'll simply have to ensure that the PS4 is set as the primary device for the PlayStation Network account. Here's how:
You can also check out the PlayStation Support site for some additional information regarding primary settings.