Hello karlafromvienna,
Welcome to Apple Support Communities!
We want to help get your Epson FF-680W working normally again with your Mac.
We see you viewed the Apple Support page for 32-bit app compatibility with macOS High Sierra 10.13.4 and later - Apple Support
This page from Epson has the current driver for your Epson FF-680W: SPT_B11B237201 | Epson FastFoto FF-680W | FastFoto Series | Scanners | Support | Epson US
Then try again to connect your printer:
"Connect an AirPrint, Wi-Fi, Ethernet, or USB printer
- Do one of the following:
- Connect wirelessly: Join your wireless network from the printer’s interface. For directions, see the documentation that came with your printer.
- Connect with a USB or Ethernet cable: Plug one end of the cable into your printer, and the other end into the base station’s USB port
or Ethernet port
.
- Choose Apple menu
> System Settings, then click Printers & Scanners
in the sidebar. (You may need to scroll down.) - Select your printer on the right. If the printer isn’t listed, click the Add Printers, Scanners, or Fax button, then add your printer.
See Add a printer and the Apple Support article Connect an AirPrint printer to a Wi-Fi network.
Note: Error or status messages may not appear when the printer is connected to a base station. For example, you may not get messages such as Out of Paper or Printer Busy."
This Apple Support page has the full details: Add a printer to your Wi-Fi network in AirPort Utility on Mac - Apple Support
If you still have issues, please continue working with Epson support for help with the Epson printer.
Cheers!