Omega 4 Sub-Theme problem with file_get_contents(make.libraries) failed to open stream
It's a known bug of Omega theme, so you should follow Drupal issue queue for details: Invalid or empty make file: libraries.make.

As workaround, you may to navigate to subtheme's folder (e.g. fifth_avenue subtheme dir) and run:

drush make libraries.make --no-core --contrib-destination=.