So we are still waiting for your screen shot. In your comments, you need to be very specific. For example, when you click the PDF button in Manager, it most definitely should not print. It should generate a PDF image, which you might then print from within your PDF reader (presumably Preview). Please clarify that, as small differences in behavior point to widely different problems.
Once we can read your screen shot, we may be able to diagnose your problem.
By the way, did you install–to the letter–exactly as explained in this Guide:
https://forum.manager.io/t/installing-or-updating-desktop-edition-on-macos/7116