Doing a simple JObject.parse(inJson) from Newtonsoft.json gives me the error Unable to cast object of type 'Newtonsoft.Json.Linq.JValue' to type 'Newtonsoft.Json.Linq.JObject

Works fine on my end:

Used the json from your last post (btw - added code tags there, otherwise the quotes get mangled on copying).

Studio 24.10.9, Newtonsoft.Json 13.0.0, C# project