Scaffolding controller doesn't work with visual studio 2013 update 3 and 4

Question

Im unable to scaffold a controller (MVC5 Controller with views, using Entity Framework) in Visual studio 2013 (update 3 and 4). The error message is below:

There was

Answer 1

mine got fixed like this:

    public virtual DbSet Categories { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        //--> EntityTypeConfiguration
        modelBuilder.Configurations.Add(new EntityTypeConfiguration());  

        base.OnModelCreating(modelBuilder);
    }

DOn't forget Ctrl + Shift + B so your code compile (i'm not sure for single solution, but since mine is in another project in same solution, it should get compiled first)