Create local Nuget package for NDLC

I remember following these steps and was able to create nuget package for NDLC which still works on my desktop but not working on laptop. Anything important that I am missing or doing wrong?

1. Create a new project. Search “class library” and select first. .NET Standard 2.1
2. Clone NDLC repo and copy the NDLC library files to this project.
3. Project properties ->Package. Check on Generate NuGet package on build. Save.
4. Tools -> NuGet Package Manager -> Manage NuGet packages for solution. Install NBitcoin and NBitcoin.Secp256k1.
5. Build and pack it.

[NicolasDorier]

I renamed this method, this is TryTweakMult I think now.