Secondo questo articolo di notizie , l'aggiornamento a WhatsApp è stato eliminato ora. Dagli qualche ora e assicurati che l'app sia aggiornata, quindi riprova.
The company has pushed out its update for iOS 10, meaning that it’s now compatible with the variety of useful features that the new iPhones update includes. And many of those are most important for things like WhatsApp.
The new iOS update brings huge improvements to Siri, which is now much smarter. Those changes are central to apps like WhatsApp, because the two can now be integrated.
So, finally, asking Siri to “Send a message on WhatsApp to John saying hello”, will actually make that happen. A special window will pop up with a preview of the message, just like has long happened with the built-in messaging app, and you can then send it off to people.