despite paying for unlimited there appear to be no challenges for me, I have done some of the speaking ones but they are very simple and now seem to have disappeared...Spanish course is my interest and Italian if it existed!!!!!
I can’t see these on the web version either. They are in the app.
@Les-Cullen have you tried with Google Chrome/ Chromium / SRWare Iron / Opera (any of them)?
@Les-Cullen try full refresh (Ctrl+F5). It is reportedly challenges are now available on all platforms.