Nothing happens when you click the print button.
This problem occurs when popups are blocked. Modern browsers do this until you tell them you are happy for the site to generate popups.
Solution:
Select the notification, and choose the option to always allow popups from my apetito. Then try the printing process again.
If you have third-party popup blocking software, they will either need to be temporarily disabled, or my apetito added into their exceptions list.