Here is part of an error msg. This is a simple console app in one file that runs fine in visual studio 2017. I started with a new solution from the water ide so I do not see how framework problems would show up like this. Version 10.0.0.2363 (develop). I made a new solution, a new project and pasted the cs code from a working vs17 app.
E: Package Microsoft.NETCore.App:2.2.1 has no deliverable for platform ‘netcoreapp 2.1’.
Project ‘h2oConApp1’ failed to build.
Solution ‘H2O_ConsoleApp1’ failed to build all projects.