[ROS2 Basics in 5 Days (Python)] Unit 3 autocorrected quiz cannot be launched

I tried to click Unit 3 autocorrected quiz but the system did not have any response. I have finished the quiz for Unit 2 and it has no problem. Would anyone take a look at it?
Thank you!

Hi, the system has only recorded your first quiz “Understanding ROS2 Topics”, and shows that you have not attempted to submit the following quizzes. Could you try logging out and trying again?

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