Apple TV - Content Unavailable

I am trying to watch 'Wicked Little Letters' movie - a search on the internet shows it can be watched on Apple TV. I go into Apple TV and when I click on the title I get a message saying ' Content Unavailable/ This content is no longer available"

I tried searching the internet for an explanation and found nothing. Does anyone know why this message is coming up - has the film been withdrawn from Apple ??