Installed Unity 5.6.3p2 (my projects's current version) on a new machine. When I opened the project in Visual Studio 2017 I got a prompt to update the .NET framework from 3.5 to (I think) 4.2.x. I confirmed the upgrade for all projects in the solution but now all I get is this
If I close and reopen visual studio I no longer get the upgrade prompt. I tried downloading .NET 3.5 to no avail. Any information is appreciated.