Hi Eric, and @colin Colin, thanks for the quick reply.
The track works if I sign out, so thanks for that workaround. It’s just strange that it only happened with this track and not the others. I don’t think any of my extensions are causing this, as I don’t really have anything special besides McAffee on my browser. But as I’m not very tech-savvy there could be others that maybe I am not necessarily seeing.
Anyway, I’m good to go. Progress-tracking not as important, as long as I can do the video! 
Cheers!