On https://www.thingiverse.com/thing:4649702/files the "download all" button downloads a ZIP containing only LICENSE and README files.
Neither of those files match the contents of the thing, and the SCAD and STL files are entirely missing.
That was a general problem, it works again now ..
Nope! That one is still broken. We're going to have a look at it.
It appears to be fixed now, at least for that design. Though there is a JPEG in the download named "null".