VS 2017 Metadata file '.dll could not be found

Question

I know there is another question with exact the same problem, but I went trough all those answers, and none helped me. :( (This was the question.)

I just created a new A

Answer 1

What worked for me:

Package Manager Console (Visual Studio 2019 Comunity):

Install-Package NuGet.CommandLine
nuget locals all -clear

Rebuild solution.