I have a fresh instance of galaxy-dist#stable. I create users and upload a workflow via the internal python api, and then I attempt to edit and download the workflow from the workflow editor tab. I click the direct download link and get the attached exception. I found that the exception is avoided if I instead share/export the workflow and then create a public username when prompted. When I go back and use the direct download link again, it works. Not sure if they're directly connected, but something in the share/export seems to band-aid the other. Presumably the 'None' should be the public username. Cheers, -Evan Bollig Research Associate | Application Developer | User Support Consultant Minnesota Supercomputing Institute 599 Walter Library 612 624 1447 evan@msi.umn.edu boll0107@umn.edu