系统错误，请联系管理人员：

System.Exception: 发送消息发送错误，请联系系统管理员。错误信息：目标成员不存在，请重新选择
   at BooksOut.Util.QYSendMsg(String email, String msg, String type) in C:\D\GitLab\MSA_booksout\BooksOut\Common.cs:line 641
   at BooksOut.Business.AlertOverdue() in C:\D\GitLab\MSA_booksout\BooksOut\Business.cs:line 62
   at BooksOut.Global.AutoJob(Int32 sec) in C:\D\GitLab\MSA_booksout\BooksOut\Global.asax.cs:line 98
   at BooksOut.Global.Application_PreRequestHandlerExecute(Object sender, EventArgs e) in C:\D\GitLab\MSA_booksout\BooksOut\Global.asax.cs:line 62
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

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