for me dotnet sdk helped: https://dotnet.microsoft.com/download
maria?
Update to the latest Visual Studio (currently: Visual Studio 2017).
Ensure that all the F# and .NET Core components are installed (found in the VS installer under "Individual Components).
MSB4019: The imported project "c:....paket\Paket.Restore.targets" was not found. Confirm that the path in the declaration is correct, and that the file exists on disk
what exactly is missing?
In my case it was the wrong compiler, using the VS2017 instead of VS2015 did the trick - but I downloaded .net core and .net framework before that, that did not work (properly because the old compiler was still selected automatically - but can't say for sure)