ErrS23 appears on the computer screen.
Since the shape was larger than the mat, it was reduced in size when imported. (ErrS23)
The pattern being imported from the SVG / DXF file was larger than the mat.
When pressing the [OK] on the screen, reduce the pattern to fit to the size of the mat and import it in CanvasWorkspace.
If you do not want to reduce the pattern, edit it to fit the size of the mat beforehand.