That means that information is going from Photoshop to the printer driver, but something has gone wrong after the image data leaves Photoshop.
You can try resetting Photoshop's preferences (just in case some stale information is stuck in the printer setup).
But after that, you'll need to talk to Epson to diagnose what is going wrong in the OS or driver parts of the print process.
Thanks Chris, that worked. Appreciate your taking the time to answer!
Most likely something changed in the driver during an upgrade of the OS or drivers, and Photoshop had old information left in preferences.
Glad to hear you got it working.