Directory Overlay Module update Test Run fails each time (Download just spins...)

Background info:

Directory Overlay - Update Modules - Mender Hub

This is what I see for 10 minutes:

I did everything according to instructions. They were working then failing then working then failing the other day. Now not even working once. Why can’t the download of 7MB occur?

It’s quite a lot of work to create and test out a single update. So would like some help on this one.