Error with Visual Studio 2017

[andrewinkler1]

Class:
namespace ProductsApp.Models
{
public class Product
{
public int Id { get; set; }
public string Name { get; set; }
public string Category { get; set; }
public decimal Price { get; set; }
}
}

Error:

at Microsoft.CodeAnalysis.SolutionParser.GetPossibleProjects(Document doc)
at DtoGenerator.Vsix.GenerateDtoCommand.d__13.MoveNext() in F:\git\dto-generator\src\DtoGenerator\DtoGenerator.Vsix\GenerateDtoCommand.cs:line 208