Can't click on Map Quiz #2

I recently made a few quizzes of this mode (where you click on the map), but today I made one in the same way as the other ones, and I couldn't click on anything. What's weird is that I used the same SVG in the original Map Quiz mode (where there's a list for you to click), and everything worked out perfectly. I can click around on the map without any problems.

Any idea what might cause this problem specifically in the Map Quiz #2 mode? I really prefer this mode because I don't need to search for answers in a tedious list, clicking on maps is more satisfying!