The Bistro menu items suddenly vanish.

Problem: 

The menu items suddenly vanish. This sometimes happens when the internet connection is unstable.

Solution:

Press the Hamburger icon at the bottom of the screen and swipe to close the application. 

Reopen the application and Enter your pin. The menu options will appear.  Give it a few seconds then try making a sale. If the card reader does not respond, call an admin to update the settings.