This issue is so common this can be raise due to many reason, In this case you can follow some instructions given below -
1).Check for system updates if there is any update available do it.
2).Re-activate your device and restart hulu.
3).Uninstall and re-install hulu
In this way you can easily fix all the issues related hulu for any kind of technical error's can contact our expert's by visiting www.hulu.com/activate They can fix your issues within few minuter.