Proget 5.0 upgrade - paket no longer works

[Spenser Austin]

Does anyone use paket in conjunction with Proget nuget feeds? Ever since upgrading to v5.0, paket can no longer find a nuget package I reference.

Could not find versions for package AzureHelper on any of ["<progetserverurl>/nuget/MainFeed"; "https://www.nuget.org/api/v2"].
	-  Source '<progetserverurl>/nuget/MainFeed' yielded no results
		-  Request '<progetserverurl>/nuget/MainFeed/FindPackagesById()?semVerLevel=2.0.0&id='AzureHelper'' finished with error
		-> Could not retrieve data from '<progetserverurl>/nuget/MainFeed/FindPackagesById()?semVerLevel=2.0.0&id='AzureHelper''
		-> RequestFailedException: Request to '<progetserverurl>/nuget/MainFeed/FindPackagesById()?semVerLevel=2.0.0&id='AzureHelper'' failed with: 401 Unauthorized - 
		-  Request '<progetserverurl>/nuget/MainFeed/Packages?semVerLevel=2.0.0&$filter=Id eq 'AzureHelper'' finished with error
		-> Could not retrieve data from '<progetserverurl>/nuget/MainFeed/Packages?semVerLevel=2.0.0&$filter=tolower(Id) eq 'azurehelper''
		-> RequestFailedException: Request to '<progetserverurl>/nuget/MainFeed/Packages?semVerLevel=2.0.0&$filter=tolower(Id) eq 'azurehelper'' failed with: 401 Unauthorized - 
	-  Source 'https://www.nuget.org/api/v2' yielded (0): []
		-  Request 'https://www.nuget.org/api/v2/FindPackagesById()?semVerLevel=2.0.0&id='AzureHelper'' finished with: []
		-  Request 'https://www.nuget.org/api/v2/Packages?semVerLevel=2.0.0&$filter=Id eq 'AzureHelper'' was cancelled (another one was faster)

Does anyone have any ideas on how to fix this?

Product: ProGet
Version: 5.0.10

[atripp]

The error is "failed with: 401 Unauthorized", so it probably means you need to specify an authentication source?

We didn't change the way authentication is handled in v5, so it's likely unrelated to the upgrade.