Siri return "Sorry, I can't open "Siri Voice Shortcuts"" in the sample code of SoupChef, but I don't know how to fix it?

When SoupChef ask you "Would you like to add any toppings?", you don't say anything until siri finishes. Siri will return "Sorry, I can't open "Siri Voice Shortcuts"". Is it a bug? How to fix it?