C# – NuGet fails to find existing package

c++nugetnuget-packagenuget-package-restore

How it's possible that NuGet's Install-Package fails with Unable to find version 'x' of package 'y' when that exact version is released as NuGet to the official repository and it shown on the https://www.nuget.org/packages/y page.

Here is specific sample with nuget.org content and NuGet Install-Package command output.

nuget package snapshot

install package failure

UPDATE. Package sources are set to defaults (from nuget.org). Actually, you can see the issue just by running Install-Package Log4Net.Async -Version 1.3.0.

package sources

UPDATE 2. I want to highlight that it's not about some developer's machine – the same things happen on Visual Studio Online Hosted Build Controller.

UPDATE 3. Here is how NuGet tries to load package and it looks like NuGet API just broken, because all these requests fail with the error below.

install-package intercepted http requests

Resource not found for the segment 'Packages'

Also NuGet produces a strange output on NuGet API calls that issued at VS search packages stage, please see here: http://pastebin.com/qveadrZB.

Best Solution

NuGet currently has some service issues related to search and package restore functionality. It is possible this is the cause of your package restore failure.

If other dev machines are working OK, it's likely they have access to a cached version of this package.

Screenshot of status.nuget.org on 26 May