Just want to provide an update on this. We regularly rotate the link where the images can be downloaded from, so that way individuals who have taken, and completed, the course do not regularly re-download the images, and possibly prevent those who are actively taking the course from accessing the data that they need.
We also do this for the individuals who post the link(s) publicly, which causes the same issues. If you are actively taking the course, and you cannot access the images, please send an email to support, which will open a ticket, and we can address the issue.