Frage Adobe illustrator to uccnc

I wonder if anyone can help?

I have a simple shape I’ve designed in Adobe illustrator - to make a tool template from 3mm Perspex.

I’ve tried exporting it as a dxf file and importing it to uccnc, but uccnc pops up an error when I try to import it.

Does anyone have dxf export settings which are known to work?