We upgraded to octopus deploy 3.4.x yesterday (9/1/2016) and we can no longer deploy packages hosted on our TeamCity server (9.1.7).
TeamCity can only host V1 nuget feeds and it appears that the 3.4.x upgrade is expecting a V2 feed. Here’s a sample error:
The V2 feed at ‘http://build.xxxxxx.com/guestAuth/app/nuget/v1/FeedService.svc/Search()?$filter=IsAbsoluteLatestVersion&searchTerm=‘Longbow’&targetFramework=‘unsupported’&includePrerelease=true&$skip=0&$top=10’ returned an unexpected status code ‘404 Not Found’.