Error - Code 500 - Chinese - Immerse - Practice words

Getting the error code 500 on the immerse practice words for the video “Who am I exactly?” (Memrise). I can get a few words done before the error pops up. So far, it’s only on this video, I tried another, and it worked fine.

Using Opera GX on desktop.

Hello @lexa_452 ,
This was due to some rogue items missing a pinyin value! Sorry for the inconvenience, this has been fixed now.
Happy learning!