in this course:

Hi, in this course:
http://estheticnet.com/dest/academy/ultimas-tecnologias-en-aparatologia-estetica/

If enroll and you access any unit, at the bottom of the unit page, the button says "Done" (Hecho, in spanish), instead of "Next Unit".

Why?
How can I solve that?

Support access is granted.

Thanks,
Damian