Training error during - Updating nuget dependencies

[arung2207]

System Information (please complete the following information):

• Model Builder Version: 17.16.0.2326802
• Visual Studio Version: Microsoft Visual Studio Community 2022 (64-bit) - 17.6.3

Describe the bug

• Following the instruction at https://dotnet.microsoft.com/en-us/learn/ml-dotnet/get-started-tutorial/intro
• I am getting exception on the training step. With following dialog
  

To Reproduce
Steps to reproduce the behavior:

1. Clone the repos https://github.com/arung2207/MLDemo
2. Open the MLModel1.mbconfig in ConsoleApp2 project
3. In the training step click Train again
4. You should see above error dialog. The complete log file is available at https://github.com/arung2207/MLDemo/blob/master/02-ML/ConsoleApp2/MLModel1-51LQWU.txt The error snippet from the log is shown below

Updating nuget dependencies... (Microsoft.ML.ModelBuilder.Utils.Logger.Info)
2023-06-15 12:11:18.3856 INFO Starting update NuGet dependencies async. (Microsoft.ML.ModelBuilder.Utils.Logger.Info)
2023-06-15 12:11:18.6972 INFO Project Miscellaneous Files cannot be accessed. It may be unloaded. (Microsoft.ML.ModelBuilder.Utils.Logger.Info)
2023-06-15 12:11:18.7112 INFO Couldn't find project named C:\Repos\MLDemo\02-ML\ConsoleApp2\ConsoleApp2.csproj (Microsoft.ML.ModelBuilder.Utils.Logger.Info)
2023-06-15 12:11:18.7112 INFO Installing nuget package, package ID: Microsoft.ML, package Version: 3.0.0-preview.23266.6 (Microsoft.ML.ModelBuilder.Utils.Logger.Info)
2023-06-15 12:11:18.7305 WARN ModelBuilder fails to install the following nuget dependencies

• package name: Microsoft.ML
• package version: 3.0.0-preview.23266.6

5. The project doesn't compile as the NuGet package couldn't be added.

Expected behavior
The training step should finish without any errors and the NuGet packages should update successfully

[arung2207]

I have noticed when the project is not within a Solution Folder (like in this case ConsoleApp2 is within 02-ML solution folder) the Training step seems to work fine, the NuGet dependencies is correctly added and the project compiles fine.

[LittleLittleCloud]

Thanks for reporting. We'll take a look

[LittleLittleCloud]

After a closer look, it turns out that the error is because Project.Name somehow is null in the following solution structure (project in a folder)