Hidden word that can't be learned (English 3 for Dutch speakers)

Memrise Bug Control Web Bugs
1

Hi

I have a problem with Memrise course ‘Engels 3’, English for Dutch speaking, level 34.

There are 19 words, but the level word count says ‘20 words’.
So there’s 1 word that can’t be learned, en I can’t load a new learning session.

Thanks in advance!