I don’t know why this answer is wrong. Is this a bug?
Are you using any scripts? Especially the Katakana Madness script, that one seems to have been causing problems for a lot of people lately.
I deactivated all scripts and now it’s working. Some script must be the problem. Thank you!
Came here to report this too. One of my scripts was being lame during the lesson quiz. Not sure which one though. Thanks anyway!