Spanish 1 course broken by "dead words"... again

My spanish 1 course is says that I have 10 new words left, but if I select “Learn new words” I get just some unhelpful message that I should check support page. From what I understood it might be because of web and mobile app content…
The thing is, this is the second time this happened. First time the support person was not able to help me and I ended up having to restart the course from beginning and finish it again. Why is this keep happening? The web version obviously plays a second role for Memrise (you just need to look at the better “difficult words” sessions or the grammar lessons), but I would hope that it at least doesn’t get broken over time…
Oh well, I guess I just needed to vent… since Memrise is mobile-focused service and I am primarily PC user I have already canceled my subscription…