It should be accepted now, but unfortunately it takes some time for the changes we make in the Incubator to be active for users (sometimes as long as two weeks).
Still, please report (with the button in the lesson, not in the discussion) if it's not accepted, it's still possible something got missed!
Remember that this course was released only two days ago and in any new course there are thousands of things needing fixed. We've been working on them, but we're all real people with jobs, families, and other real life responsibilities as well, so we can't get to everything right away.
Also, could you please report issues using the button in the lesson rather than in the discussion? The reports go straight to us, while we often don't see comments in the discussion or can't get to them right away and forget, while the report is a constant reminder, and also once the problem is fixed the comments are still there and will confuse other learners.