After restarting, the error light should be gone. Print a nozzle check pattern to ensure performance.
The Epson L5290 Adjustment Program (often called the AdjProg, Reset Utility, or WIC Reset Utility) is a proprietary service tool developed by Epson for authorized service centers. It is not an official consumer driver or application found on Epson’s public website. Epson L5290 Adjustment Program Download
Important Distinction: This is not a driver. You still need the official Epson printer driver for daily printing. This is a repair tool. After restarting, the error light should be gone
Epson does not publicly release the official Adjustment Program to end-users. It is reserved for authorized service centers. Therefore, your legal and safe options are: Epson does not publicly release the official Adjustment