Hi,

I am having real problems when trying to enable cors on Umbraco if Plumber is installed.

I followed the comment here: https://our.umbraco.com/forum/umbraco-7/using-umbraco-7/63841-Web-API-2-and-cross-origin-resource-sharing-CORS#comment-226426

The error which is thrown is:

<Error><Message>An error has occurred.</Message><ExceptionMessage>The object has not yet been initialized. Ensure that HttpConfiguration.EnsureInitialized() is called in the application's startup code after all other initialization code.</ExceptionMessage><ExceptionType>System.InvalidOperationException</ExceptionType><StackTrace>   at System.Web.Http.Routing.RouteCollectionRoute.get_SubRoutes()
   at System.Web.Http.Routing.RouteCollectionRoute.GetRouteData(String virtualPathRoot, HttpRequestMessage request)
   at System.Web.Http.WebHost.Routing.HttpWebRoute.GetRouteData(HttpContextBase httpContext)</StackTrace></Error>

This is on umbraco 7.13.2 with WebApi 5.2.6

I have tried using all the application start handlers instead of overriding with the above comments code, with the same outcome.

Any help would be appreciated!