image appears as blank.

Hello I am trying to draw a barn
I am drawing multiple files to submit to my county as Arch D/ Arch 4/ 24 in x 36 in.
all of my other files besides this one appear as visible when I print to pdf.
I attempted printing to pdf 24 and got the same result on this file.
I have been able to export as an image already

I am running window ten libre ca 2.1.3

top_rafters.dxf

All lines are drawn with the out of the box setting linewidth is "By Layer". In layer attributes linewidth is set as 0.00mm. So all lines are drawn 0.00mm wide. If you export to pdf it depends on the viewer how this is shown. Some show them as thin lines which do not grow thicker when you zoom in, some drop them completely or show as a very, very faint line only.
Set linewidth in the Layer List via the Modify Layer Attributes button to 0.25mm or similar.
Does this help?