[3dprinter-general] Bug#904919: Bug#904919: cura: AssertionError on STL load

[Gregor Riepl]

This is a really strange bug, because I can load the STL file just fine.
But somebody else reported a file to me that they couldn't load (it would bail
out with the same error), and it seems like this is a known issue.

I just wonder what's different on my machine that it doesn't have this problem?

It's a long shot, but do you have python3-stl installed?
I have marked it as a Recommended dependency in python3-uranium, so it might
not be installed on every system.