How does your constructor look? A new thing in V9 is that you need to call the constructor of the base class with the parameters it wants, your constructor should look something like:

using Umbraco.Cms.Core.Cache;
using Umbraco.Cms.Core.Logging;
using Umbraco.Cms.Core.Routing;
using Umbraco.Cms.Core.Services;
using Umbraco.Cms.Core.Web;
using Umbraco.Cms.Infrastructure.Persistence;
using Umbraco.Cms.Web.Website.Controllers;

namespace RoutingDocs.Controllers
{
    public class MyController : SurfaceController
    {
        public MyController(
            IUmbracoContextAccessor umbracoContextAccessor,
            IUmbracoDatabaseFactory databaseFactory,
            ServiceContext services,
            AppCaches appCaches,
            IProfilingLogger profilingLogger,
            IPublishedUrlProvider publishedUrlProvider)
            : base(umbracoContextAccessor, databaseFactory, services, appCaches, profilingLogger, publishedUrlProvider)
        {
        }
    }
}