SerializationException: Invalid JSON string
PlayFab.Json.PlayFabSimpleJson.DeserializeObject (System.String json) (at Assets/PlayFabSdk/Shared/Internal/SimpleJson.cs:569)
PlayFab.Json.PlayFabSimpleJson.DeserializeObject (System.String json, System.Type type, IJsonSerializerStrategy jsonSerializerStrategy) (at Assets/PlayFabSdk/Shared/Internal/SimpleJson.cs:601)
PlayFab.Json.PlayFabSimpleJson.DeserializeObject[HttpResponseObject] (System.String json, IJsonSerializerStrategy jsonSerializerStrategy) (at Assets/PlayFabSdk/Shared/Internal/SimpleJson.cs:609)
PlayFab.Json.SimpleJsonInstance.DeserializeObject[HttpResponseObject] (System.String json) (at Assets/PlayFabSdk/Shared/Internal/ISerializer.cs:85)
PlayFab.Internal.PlayFabUnityHttp.OnResponse (System.String response, PlayFab.Internal.CallRequestContainer reqContainer) (at Assets/PlayFabSdk/Shared/Internal/PlayFabHttp/PlayFabUnityHttp.cs:221)
UnityEngine.Debug:LogException(Exception)
PlayFab.Internal.PlayFabUnityHttp:OnResponse(String, CallRequestContainer) (at Assets/PlayFabSdk/Shared/Internal/PlayFabHttp/PlayFabUnityHttp.cs:265)
PlayFab.Internal.<Post>c__Iterator1:MoveNext() (at Assets/PlayFabSdk/Shared/Internal/PlayFabHttp/PlayFabUnityHttp.cs:197)
UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)