Something is wrong with the network devices for Wi-Fi connection.

Turn off the devices you want to connect to the network. Wait for about 10 seconds, and then turn on the devices in the following order; wireless router, computer or smart device, and then printer. Move the printer and computer or smart device closer to the wireless router to help with radio wave communication, and then try to make network settings again.

You can also watch the procedure in the Web Movie Manuals. Access the following website.

https://support.epson.net/publist/vlink.php?code=VC00017