EOF error when downloading files from system-image server

Today when running u-d-f to generate snappy images I started getting EOF error frequently:

sudo ubuntu-device-flash --verbose core rolling --output /tmp/snappy-test/image/snappy-rolling-edge-latest.img --channel edge --developer-mode
Determining oem configuration
Starting download of generic-amd64
41.70 KB / 41.70 KB 100.00 % 12.55 KB/s
Done
Starting download of icon for package
38.97 KB / 38.97 KB 100.00 % 17.84 KB/s
Done
Fetching information from server...
Downloading and setting up...
Download finished for /home/elopio/.cache/ubuntuimages/ubuntu-core/rolling/edge/generic_amd64/version-208.tar.xz
Download finished for /home/elopio/.cache/ubuntuimages/pool/ubuntu-3a28eb645cb154bacdbd33513c142c4f9aa818da94ad3ce864aed83c1f4398a5.tar.xz
Searching for hardware.yaml in device part
2015/10/26 19:23:42 Get https://system-image.ubuntu.com/gpg/image-master.tar.xz.asc: EOF