Hi John,

This is the odd thing because the exception does not appear in the log files. I get it in the browser only but you are correct there is an inner exception thrown:

{
   "Message":"An error has occurred.",
   "ExceptionMessage":"An error occurred when trying to create a controller of type 'PhoenixApiController'. Make sure that the controller has a parameterless public constructor.",
   "ExceptionType":"System.InvalidOperationException",
   "StackTrace":"   at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)\r\n   at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()",
   "InnerException":{
      "Message":"An error has occurred.",
      "ExceptionMessage":"Value cannot be null.\r\nParameter name: umbracoContext",
      "ExceptionType":"System.ArgumentNullException",
      "StackTrace":"   at Umbraco.Web.WebApi.UmbracoApiControllerBase..ctor(UmbracoContext umbracoContext)\r\n   at Umbraco.Web.WebApi.UmbracoAuthorizedApiController..ctor()\r\n   at PhoenixConverters.Controllers.PhoenixApiController..ctor()\r\n   at lambda_method(Closure )\r\n   at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)"
   }
}

I've even tried adding the following constructors but the issue remains:

public class PhoenixApiController : UmbracoAuthorizedApiController
{
    public PhoenixApiController() : base(UmbracoContext.Current)
    {

    }

    public PhoenixApiController(UmbracoContext umbracoContext) : base(umbracoContext)
    {

    }

    [...]
}

Seems sooo looong ago now I can't remember exactly but I have just opened up my fork and the PhoenixApiController I have inherits from UmbracoAuthorizedJsonController - see if that helps and let me know?

Edit: Additionally, I have no constructors in the class