I know that it's stupid but...I cannot upload models (Designfutures.club) from browser. I have that error:
2 errors prohibited this design from being saved:
** Design attachments file content type is invalid**
** Design attachments file is invalid**
From voxelizer it's working but I would like to upload all model items separately. I know that some uploaded items have several files and it's useful. I checked them but I still don't know why my STLs are wrong. I use SketchUp but I also tried to export STLs from other software, like MeshLAB or FreeCAD. Also STL saved by Voxelizer is bad.
This is simple file I cannot upload:
test.stl (5.6 KB)
So - what should I do? (Yes, I tried other browser and other PC)