I am having similar issues. I used the above video for reference. The installation gets to 99% before the error code pops up.
-the usb cable is not connected
- the wi-fi Ethernet connection to your printer was lost.
the printer is powered off.
i am using a usb cable. I do not have the printer(espon xp15000) connected to the wifi.
the print is on. But was idle so the screen did power down.
thank you in advance for any recommendations.