Ah, right. I'm sorry, that was the wrong suggestion
There are two issues here:
1. There is an error message, and that error message causes an error.
2. The reason for the error message is that the file format version is not supported by Inkscape. You need to convert it to version 13 of the dxf file format. To do so, you can use any CAD software that does it. I use LibreCAD for this, the error message suggests something called QCad.