.NET Core NuGet Package from Azure Artifacts cannot resolve namespaces

I create several NuGet Packages using CI/CD and I can successfully import them into my project, but somehow my .NET Core project cannot find the Classes and Namespaces?

So in Azure Artifacts I have the package Common.Helpers:1.0.5:In the Nuget Package Explorer I have:

 - bin   - release      - netcoreapp3.1      - Common.Helpers.deps.json      - Common.Helpers.dll      - Common.Helpers.pdb

Also, I checked with NuGet package explorer, to see if the .dlls are in there and they are.

I just noticed that my nuget package contain the .dll files. But when I do a nuget add to a local directory, it does not extract the dlls?

What else can I do ?