Solved SK-Error

Solved it by adding <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" /> to nuget.config. This line was missing. Solution from here: https://github.com/dotnet/interactive/issues/1478#issuecomment-906836654

Thanks to SemanticKernel discord for helping look at the issue. We pointed to the fact that the error message was referencing a fsharp folder, while the cell was using csharp. This helped me to investigate further and somehow I stumbled upon the referenced GitHub issue - which solved it instantly with the added line. ❤️