[GRASSLIST:401] v.in.shape: Polygon controller contained error

Hello,

Trying to import a shape file in 5.0 I get the following error:

Shape No. 356: Polygon Shape with 107 vertices.
    ERROR: Polygon controller contained error.

FATAL ERROR: There was a problem importing the map.

What does this mean, and how might I go about solving this problem ?

Moritz