It is upgraded to version 13.0.47 and uses .NET Core
I experienced the problem while running on my local environment which uses 'localhost' running on IIS express to display the site. However, when I deploy this to an actual IIS web server, all is working properly, and I see no 404 errors. Something on my local Visual Studio environment is preventing the scripts from loading. I'm not sure I'll spend that much time debugging my local environment since it is running on the server.