Update Set更新JsonMap列时出报异常

#### 问题描述及重现代码：

```c#
[JsonMap]
public UserLoginsettingsModel user_loginsettings { get; set; } = new UserLoginsettingsModel();

return fsql.Update()
.Set(a => a.user_email == model.user_email)
.Set(a => a.user_loginsettings==model.user_loginsettings)
.Where(a => a.userid == model.userid)
.ExecuteAffrows()>0;
报错

用
return fsql.Update()
.SetSource(model)
.Where(a => a.userid == model.userid)
.ExecuteAffrows()>0;
则正常
```
异常截图

#### 数据库版本
Sql Server2012

#### 安装的Nuget包
FreeSq 3.5.303
FreeSql.Provider.SqlServer 3.5.303
FreeSql.Extensions.JsonMap 3.5.303

#### .net framework/. net core？ 及具体版本
.Net 4.8