Hola
My Spanish is a little dormant at the moment, but I’ve experienced the same thing…
This is from the log I kept when I worked through level 1 last year
You should see a pop up dialog when you click on the vocabulary list button. (Better to use the vocab list than Google Translate, since the vocab list should directly match the course).
Are you browsing from a desktop/laptop/tablet/phone?
Are you using IE/Firefox/Chrome/built in phone browser?