Linux Mint Epson Printer Fix

I’m on Linux Mint Cinnamon and my Epson WF-7830 is already added with the vendor-supplied driver, yet every job just sits in “processing”. CUPS logs hint at missing PKI pieces, so I suspect a certificate or dependency problem rather than a driver issue... (Budget: £250 - £750 GBP, Jobs: Linux, Network Administration, System Admin, System Administration, Technical Support, Troubleshooting, UNIX)