Sometimes you might face printing issues while working in PDF Expert - there could be several troubleshooting options for each case.
If you're using a printer with system drivers and if you have trouble printing a file - e.g. some of the elements are printed in black, something is absent on the page or the file can't be printed at all, the reason might be related to the system. PDF Expert uses the macOS system printing, thus we're always suggesting that you try printing the same file in the Preview app since this app uses the same system component as ours in terms of printing.