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UI-O-Matic and Autofac

In case you are using Autofac you'll need to registed the UI-O-Matic tree controller
You'll get the error
"Message": "An error has occurred.",
"ExceptionMessage": "Object reference not set to an instance of an object.",
"ExceptionType": "System.NullReferenceException",
"StackTrace": " at Umbraco.Web.Trees.ApplicationTreeExtensions.TryLoadFromControllerTree ...


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