The error message is too vague

## File a bug

Remember:

* Please check that the [documentation](https://docs.microsoft.com/en-us/aspnet/core/fundamentals/tools/dotnet-aspnet-codegenerator?view=aspnetcore-5.0) does not explain the behavior you are seeing.
* Please search in both [open](https://github.com/dotnet/scaffolding/issues) and [closed](https://github.com/dotnet/Scaffolding/issues?q=is%3Aissue+is%3Aclosed) issues to check that your bug has not already been filed.

### Include your code

I can reproduce the issue every time. Just clone my code: https://github.com/doggy8088/VS2022ScaffoldingBug

Here are the steps to reproduce the issue:

1. Open Solution Explorer, Right-click on the Controllers folder, then `Add > Controller`.

2. Choose the item template: `MVC Controller with views, using Entity Framework`

Model class: `Course`

DbContext class: `ContosoUniversityContext`

Hit `Add` button.

3. Then you will see the following error:

> There was an error running the selected code generator: 'Exception of type 'System.InvalidOperationException' was thrown.'


The error message is really too vague. I took 2 hours to figure it out the root cause. I think the error message can be improved.

I also reported this issue there for VS2022: https://developercommunity.visualstudio.com/t/I-wish-there-is-a-feature-that-can-save/10691680?port=1025&fsid=ce2921a1-dd02-402d-8377-b214f05199a5

### Include stack traces
N/A

### Include provider and version information

Microsoft.VisualStudio.Web.CodeGeneration.Design version: `8.0.2`
Target framework: `.NET 8.0`
Operating system: `Microsoft Windows [Version 10.0.19045.4412]`
IDE: `Visual Studio 2022 17.10.3`