Model's eyebrows and nose disappear when Automatic Mesh generator is used

This is on version 5.0.06 and the trial version. When I use the Automatic Mesh generator it makes my character's eyebrows and nose disappear. I've tried using the Standard, the Deformation (little) and the Deformation (heavy) presets but all of them make the aforementioned parts disappear.

When I open the texture atlas, it says "<<NoArtMesh>> Right Eyebrow" and the same thing for the other missing parts but instead of "Right Eyebrow" it says the names of the parts that have disappeared.

Also when I use the Automatic Mesh generator, there's a box at the lower right corner of the screen saying "Mesh is opened.".

Help would be greatly appreciated!!