System.NullReferenceException: Object reference not set to an instance of an object.
   at Picture.Application.SocialNetoworks.DetailPageService.GetDetailPageItemAsync(Int32 viewerId, Int32 contentId) in /home/ubuntu/pictureweb/src/Picture.Application/SocialNetoworks/DetailPageService.cs:line 48
   at Picture.Web.Controllers.HomeController.Detail(Int32 id) in /home/ubuntu/pictureweb/src/Picture.Web/Controllers/HomeController.cs:line 107