MSBuildWorkspace.OpenProjectAsync() does not load anything

[gamadori-osm]

Version Used: VS 17.9.6 Compiler version 4.9.0-3.24121.1 (a98c90d) .NET 8 C#12

Steps to Reproduce:

1. Create a new project with the template VisualStudio.Extensibility Extension without VSSDK Compatibility
2. In the Command1.cs file inside the ExecuteCommandAsync method try to open a project/solution, here's a sample

public override async Task ExecuteCommandAsync(IClientContext context, CancellationToken cancellationToken)
{
    try
    {
        // I've tried several versions, the behaviour does not change
        MSBuildLocator.RegisterDefaults();
        using var workspace = MSBuildWorkspace.Create();
        // Does not open the project neither returns some error
        var project = await workspace.OpenProjectAsync("{path to some project}");
    }
    catch (Exception ex)
    {
        Debug.WriteLine(ex.Message);
    }
}

Expected Behavior:
open the project or throw some error.
I don't know if what I am trying to do is possible or if it is the right way to do it but I would have expected at least an error of some kind.

Actual Behavior:
the process does not go on, it seems to go on an endless wait

[JoeRobich]

This is likely another instance of #73854

[jasonmalinowski]

@JoeRobich I think this is the new extensibility model, so it would be something else (although possibility a similar root cause)

@gamadori-osm: if you attach an event handler for MSBuildWorkspace.WorkspaceFailed, is that event fired? Any failure absolutely should result in your task not waiting forever, but maybe we have multiple bugs.

[gamadori-osm]

@jasonmalinowski I've tried attaching an event handler but the behaviour does not change. The handler is never fired.