TypeError: unsupported operand type(s) for /: 'NoneType' and 'int'

[wearevr3d]

Hi There,

I'm trying CartoLineGen for the first time and looks like whatever I do, it keeps giving me the following error

TypeError: unsupported operand type(s) for /: 'NoneType' and 'int'

And I assume this is because I have to specify an output file. I have tried a new .shp or .gpkg but it keeps giving me the same error. Any idea what I might be missing here?

Thank you