sourcelink: VS 2019 fails to authenticate git credentials against Bitbucket cloud repo

I can’t get this to work. Tried removing credentials from Windows Credential Manager. Reinstalling GCM. What am I doing wrong??

I have a private repo in a Bitbucket cloud account. Visual Studio 2019 16.3.10 git-credential-manager (v1.18.4) My library csproj:

....
<PublishRepositoryUrl>true</PublishRepositoryUrl>
<EmbedUntrackedSources>true</EmbedUntrackedSources>
<IncludeSymbols>true</IncludeSymbols>
<SymbolPackageFormat>snupkg</SymbolPackageFormat>
</PropertyGroup>  
<ItemGroup>
 <PackageReference Include="Microsoft.SourceLink.Bitbucket.Git" Version="1.0.0" PrivateAssets="All" />
....

In VS this is the error log I’m getting when trying to step into the source code.

Looking for source using Source Link (https://api.bitbucket.org/2.0/repositories/etixxxxxxxxam/exxxxxxxxest/src/1d8f896c416670ef54e4d27250d744883aebcab0/Providers/AuthorizationServerProvider.cs)… Source Link errors: git-credential-manager.exe: Could not obtain credentials. Process failed with exit code -1. ERROR: The request failed with code 403 : “Forbidden”. The file was not found with Source Link.

GIT log

18:14:36.832261 ...\Common.cs:744       trace: [Main] git-credential-manager (v1.18.4) 'get'
18:14:36.922020 ...\Git\Where.cs:348    trace: [FindGitInstallations] found 1 Git installation(s).
18:14:36.936986 ...Configuration.cs:222 trace: [LoadGitConfiguration] git All config read, 22 entries.
18:14:36.941966 ...\Common.cs:479       trace: [LoadOperationArguments] interactive = 'false'.
18:14:36.942964 ...\Common.cs:505       trace: [LoadOperationArguments] writeLog = 'True'.
18:14:36.942964 ...\Common.cs:543       trace: [LoadOperationArguments] useHttpPath = ''.
18:14:36.944959 ...\Common.cs:318       trace: [EnableTraceLogging] trace logging enabled.
18:14:36.953934 ...\Common.cs:334       trace: [EnableTraceLogging] git global config found at 'C:\Users\Gonzalo\.gitconfig'.
18:14:36.955938 ...\Common.cs:378       trace: [EnableTraceLoggingFile] trace log destination is 'C:\Users\Gonzalo'.
18:14:37.017274 ...\Common.cs:85        trace: [CreateAuthentication] detecting authority type for 'https://api.bitbucket.org/'.
18:14:37.035229 ...uthentication.cs:313 trace: [GetAuthentication] authentication for Bitbucket created
18:14:37.035229 ...\Common.cs:192       trace: [CreateAuthentication] authority for 'https://api.bitbucket.org/'  is Bitbucket.
18:14:37.035229 ...\Common.cs:765       trace: [QueryCredentials] querying 'Bitbucket' for credentials.
18:14:37.046198 ...\Common.cs:709       trace: [LogEvent] Failed to retrieve Bitbucket credentials for 'https://api.bitbucket.org/'.
18:14:37.048191 ...\Program.cs:414      trace: [Get] Logon failed, use ctrl+c to cancel basic credential prompt.

Thanks!