I did the latest update to the Mac OS 10.13.4 (17E199) and suddenly couldn’t print any of my Panorama 6 files.
First thing to do is to check your printer drivers to be sure they’re fully up to date.
10.13.4 has been printing fine for me on Pan 6.
That did it!
This worked for me as well. Apparently there was a Mac OS 10.12 update specific to Hewlett Packard drivers that did not appear on the list until I plugged in an HP printer (but of course I didn’t know that because I had already been told there were no more updates). Odd that it only appeared to affecting Panorama (6, in this case).