Startup/Compilation Issues Related to CSharpCodeProvider

[BenG-NS]

Describe the bug
I'm trying to stand up an instance of the Foundation site on a dev server so we can test it out as we evaluate CMSes. The instructions (https://github.com/episerver/Foundation) mention Visual Studio, but they never direct a person to use it to build the site or anything. So I downloaded the zip file from Github onto our dev server and followed the instructions.

Having installed SQL Express and Node.js and made the required IIS settings changes, I downloaded the zip file and continued following the instructions.

The web/app.config changes don't seem to apply to my situation, since we don't have any of the services mentioned, so I don't have any URLs/keys/etc. to sub in for the "changeme" items.

I used the sqlcmd parameters "-U -P " to provide the credentials for the SQLEXPRESS sa account.

After running setup.bat, and adding the site's URL into the hosts file, opening the site yields an HTTP 500 page. In Event Viewer, I see the error below:

The CodeDom provider type "Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=3.6.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" could not be located.

Desktop (please complete the following information):

• Windows Server 2019