I suppose this is just a minor bug. According to documentation octopus server web application should run as NetworkService user. But in my case it is not. It runs from some default user, I don’t remember from whom, I can tell it later when I reach my working workstation. The result was, as mentioned in the help, that octopus server couldn’t reach local nuget feed, shared via direct path (e.g. \workstation\nuget\feed). I’ve changed server’s account to NetworkService, and it worked, as expected. So the problem is that server’s installer had set server’s user to run from wrong account.
Thanks for letting us know, we’ll fix it next release.