Thanks for the screenshots! I wasn’t aware that you were on the Dutch speakers’ course, it makes sense now. I have fixed it in the course you are learning, so if you log out and log in again, it should work this time.
For your information, the current JP course available in Dutch is actually an older version that we do no longer update. And I’m afraid it will take us a bit more time to translate the new version into Dutch. (I’m sorry)
In the meantime, if you are happy to learn in English, could I interest you in using this course below? This is better maintained and less likely for you to encounter bugs.