Mindfulness meditation does not count as a point on the growth path

I don't know why, but on both of my computers, I can't finish mindfulness meditation, as in it's supposed to show that I've progressed on the path, but instead it ends, nothing, I click on the green button, the little circle goes around and then nothing. If I stay, the screen doesn't change, if I go to the homepage, it doesn't count and I have to start it all over again and eventually change it to another activity. It doesn't happen with any other activity, just that one.