I stumbled upon this. Driver Epson L3110 Ubuntu 18.04 How to Download & Install | tutorialforlinux.com
Seems a bit much just to get a printer to work. It describes going about installing L3110 driver from deb.
Note Zorin 15.3 is based on Ubuntu 18.04, so that should be same.
Question:
Does your Software Updater point to Main Server or a Country Server?
Change to Main Server if not already done.