Have a SC-P400 with FA20I4 20/04/2018 firmware from Epson. Following this instruction https://www.2manuals.com/product_info.php?cPath=107&products_id=1851 . Printer does something, but each time I get "Update failed" message (please see picture). Tried several times with a solid USB cable on different USB ports - no success. Please advise something.