使用过程中报错cloud6.2+最新补丁

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Unexpected character encountered while parsing value: . Line 1, position 1., at Newtonsoft.Json.JsonTextReader.ParseValue(Char currentChar)
at Newtonsoft.Json.JsonTextReader.ReadInternal()
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType(JsonReader reader, Type t, JsonConverter propertyConverter)
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType)
at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)
at Kingdee.BOS.Client.Core.KDTreeViewProxyBase`1.checkResponseData(String value, Boolean isParentChecked, KDTreeNode parnode)
at Kingdee.BOS.Client.Core.KDTreeViewProxyBase`1.<>c__DisplayClassc.b__a()
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)