Ensure the printer is connected to your computer with a USB cable ; the reset will not work over Wi-Fi.
Are you currently seeing the error message, or are you just trying to clear your Wi-Fi settings ? Resetting Control Panel Defaults - L5290 User's Guide resetter epson l5290 free
– Resetting the counter without replacing the waste ink pad can cause ink to leak inside the printer, ruining the mainboard or printhead. Solution: Open the printer (look up a disassembly guide for L5290 waste pad replacement) or install an external waste ink tank. Ensure the printer is connected to your computer
before downloading, as these tools are often flagged as "false positives." Adjustment Program (Epson Resetter) resetter epson l5290 free