Error:
C:\\WebApp\\WebApp.csproj : error : The SDK \'Microsoft.NET.Sdk.Web\' specified could not be found. C:\\WebApp\\WebApp.csproj
I edited the .csproj file and changed netcoreapp2.2 to netcoreapp2.1 in this stanza & then I was able to get it working.
Exe netcoreapp2.1