Problem with video completion

Hi, I finished the video, the lab and both quizzes in Section 4 of the “hands-on” course but still the video shows up as incomplete, so I can’t proceed to Section 5!
I even played the video a second time in full, without pauses or jumps and still at the end it just stops, no “next” button, and it isn’t marked as completed.
What should I do?

Fixed the problem by using Chrome instead of Brave!