This issue can be fixed by copying the whole 'EFI' folder of http://cdimage.ubuntu.com/daily-live/current/wily-desktop-amd64.iso into the USB storage made by http://archive.ubuntu.com/ubuntu/dists/wily/main/installer-amd64/current/images/netboot/mini.iso.
This issue can be fixed by copying the whole 'EFI' folder of http:// cdimage. ubuntu. com/daily- live/current/ wily-desktop- amd64.iso into the USB storage made by http:// archive. ubuntu. com/ubuntu/ dists/wily/ main/installer- amd64/current/ images/ netboot/ mini.iso.