I can reproduce the issue with plot preview and saving to PDF from your drawing.

I think there is something wrong in Model space (and you are trying to plot from Model space) and AutoCAD cannot create plot data correctly from it. Why? I don't really know, but I noticed that your drawing was saved in application that was not developed or licensed by Autodesk, that is not in AutoCAD:

So I copied everything from your drawing to new empty drawing ad then I was able to plot from this new drawing (attached).

I also was able to save PDF from your original drawing from BricsCAD application.