Tmap not showing up on private collection

I have a private collection that I use for teaching a class. It has been working well, but just this week the Tmap images are not showing up.
The first 6 images are loading ok (although only with Chrome browser), but the Tstat contrast is not loading.
We are only getting blank brains with Chrome (or nothing for other browsers).
This was working just fine a week ago so I don’t know what happened.