The hint button no longer works

[Airbongo]

Hi! The hint button used to work fine a few days ago and now clicking it doesn't do anything. It's driving me a little nuts, to the point of completely uninstalling IntelliJ IDEA (and any files) and re-installing everything including the course but it still doesn't do anything.

It's just sitting there... begging to be clicked. But once clicked, it does nothing. It just disappoints :( https://i.imgur.com/C2gfZn5.png