I installed google authenticator on my smart phone and tried to generate a code but when I entered it into the dispenser.tf secondary authentication, it said "Code authentication failed! Please try again"

Wow, you got further than I did. When I tried, the confirm the code button didn't do anything

EDIT

looks like it works today, though when I click on 'my shop' it says no secondary authentication enabled, even though the setup page says its enabled (and when I just did it, and clicked confirm, it says it has already been set up...)