unity转微信小游戏，隐藏后台时，把数据存储到缓存里。但会报错： plugin.js:93 JsonException: Can't add a value here   at LitJson.JsonWriter.DoValidation (LitJson.Condition cond) [0x00000] in <00000000000000000000000000000000>:0  (env: Windows,mg,1.06.2402040; lib: 3.2.5) 代码如下： WX.OnHide((res) => {             WX.SetStorageSync("key", "data");             });