SourceLink Authentication error when using Microsoft.SourceLink.AzureRepos.Git

I am trying to enable SourceLink for our internal NuGet packages and am running into a problem where I don’t see how I can solve it.

My setup is:

• Visual Studio 2019 Enterprise (16.3.8)
• An Azure DevOps git repository
• A .NET Framework 4.7.2 class library with an SDK style project containing a single HelloWorld class
• A PackageReference to Microsoft.SourceLink.AzureRepos.Git, using the latest Version (1.0.0-beta2-19554-01)

This project generates a package that includes the DLL and the PDB (I know this is discouraged, but I would like to get it to work this way rather than using a symbol server; this also does not seem to be the source of the problem, since the debugger finds the correct PDB)

The project file

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net472</TargetFramework>
    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
    <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
    <RepositoryUrl>https://<host>.visualstudio.com/<project>/_git/Lib</RepositoryUrl>
    <RepositoryType>git</RepositoryType>
    <AssemblyVersion>2.0.0.0</AssemblyVersion>
    <FileVersion>2.0.0.0</FileVersion>
    <Version>2.0.0</Version>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.SourceLink.AzureRepos.Git" Version="1.0.0-beta2-19554-01">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>
</Project>

• I commit my changes to the repository and build the package. The package builds fine. When I check the generated .nuspec file, it contains the correct commit hash.
• I publish it to a local NuGet feed using nuget add Lib.2.0.0.nupkg -Source C:\NuGet.
• I delete my local HelloWorld sources so the debugger does not find these sources and tries to download them from the git repository
• I create a console application, reference this NuGet package, and call the HelloWorld function on the HelloWorld class. In the debugger, I hit F11 to step into the HelloWorld call. The “SourceLink will download […]” dialog box appears and I select “Download Source and Continue Debugging”.

This does not work. I get the following error message

Source Link Error:
ERROR: Azure DevOps: Authentication failed for all accounts. Use 'File -> Account Settings...' to add a new account or refresh credentials.

Source Link URL: https://<host>.visualstudio.com/<project>/_apis/git/repositories/Lib/items?api-version=1.0&versionType=commit&version=cf94d5a0f224b6983c3885a2a6ac29aa52cec418&path=/HelloWorld/HelloWorld.cs

Now, the error message is pretty clear, I just don’t get it. When I go to the URL stated in the error message, I see the file content I am expecting. I used a browser I never use to check, and when navigating to this page, it asked me to sign in, and I do so using the same account I use in Visual Studio. I also tried signing out of Visual Studio, restarting it, and signing in again to Visual Studio using the same account I used in the browser. Still the same error.

Any idea what I could be doing wrong?

Thanks, David

[KirillSokolovsky]

Faced the same issue with source link and our private Bitbucket server. Use Internet Explorer on local machine and authorize in your VCS with password saving IE saves password in Windows Credential Manager (Web Credential) And seems like source link uses credential exactly from here (in case authorization is required)

[wouterroos]

Bump.