I despise printing issues, they make me crazy! 

Im assuming youve shut the computer down and restarted since the issue began.  I cant print from ProSeries at all after an update  unless I reboot my computer, no clue why, it started happening in the 2018 program and still does it in 2019.

So if you choose Print to File  PDF and choose to have it Display PDF after Save, nothing ever opens or you only see a blank page?