I am working on Chapter two of "The ArcGIS Book" (Harder & Brown) in ArcGIS Pro and am having problems saving my map as a PDF. When I click share -> export and save as a PDF the saved file is either blank or saved in multiple pages in pieces like a jigsaw puzzle. I tried saving in a couple different DPIs and resolutions, tried opening and closing the program, tried copy and pasting layers into a new layout. Saving as a Tiff works fine. Wondering what the problem might be, any ideas?