Windows Server 2019 and .NET 4.8?

Alright, coming back around years after this thread for my own issues. DavidSherrill​ provided what I can only assume is the best possible solution for my situation because he provides the frame work perfectly to what I am dealing with. 

Three programs are having problems on startup:

• P508PowerAgent.exe
• Discord.exe
• ArmourySwAgent.exe

They rely on the Microsoft .NET Framework to function. There are two of the errors for each of these apps. The first reads like so:

"This application requires one of the following versions of the .NET Framework: v4.0.30319 Do you want to install this .NET Framework version now? Yes/No"

The second is a little different:

"This application requires one of the following versions of the .NET Framework: .NETFramework,Version=v4.0,Profile=Client Do you want to install this .NET Framework version now? Yes/No"

I tried David's solution, copying and pasting the text in a Notepad, saving it as " .reg" and importing it to the registry. It imported successfully, but on restart, the errors still pop up. I then tried the suggestions of grabbing from a working system and importing that to the registry, and it didn't take, instead giving me an error that a couple of others had. 

So I am completely stumped at this point and looking for answers.