Issue moving to Week 2 course

I have completed Week 1 of DS course and want to move to Week 2. However, I am not abel to do so since the Week 1 topics are not ticked (marked complete) even though I have completed it. Request quick help as I am already lagging far behind.

Hi @subbukonar,
You need to watch the videos till the last second, so that the system can mark it as complete. Can you please try this once more?

I did watch the video till the last second. I figured out the issue. It works in IE.