I went over your projects and I found that the issue is in the mesh. I have updated the mesh settings to make sure you (and everyone else) get a better mesh. The settings are:
- Mesh-to-geometry conformation operations = 6
- Max iterations for mesh conformation = 1
- Detect features between multiple surfaces? = True
You can also see this picture of the settings:
These settings were described in the text but not in the picture. The tutorial has been updated, but in the future please double check your settings with the text and the pictures.
If you go to the meshing log and scroll to the bottom of the text log, you should have 41 illegal faces, in your meshes right now you have 221.
Happy SimScaling 
Best,
Diego