Speed Review does not work for my course

I’ve created a flags course and trained more than 25 words, but Speed Review still does not work for me.
Always when I want to train in Speed Review mode I get this message:
“Whoops. Could not load the session. Sorry.
Review sessions can only be done when you’ve learned a few more words. Try it out and come back!”

Should I add something specific to my course or change settings somehow to turn on this feature properly?

Speed Review isn’t available for picture-based courses - only text-based ones.


It would make sense to make speed review available for non-text courses too.

(It actually is pretty useless in quite a few text-based courses where there is no time to read all the long sentences from the multiple-choice list. It could thus be more useful for picture-based courses than it is for some of the text-based ones)