AR dll问题

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.NET Framework  项目中使用了这颗dll，目前抛错，我需要升级到什么版本才可以避免这问题

"Exception": "GrapeCity.ActiveReports.ReportException",
  "ExceptionMessage": "An unexpected error occurred. Additional information: '程序集“GrapeCity.Documents.Pdf, Version=5.1.0.790, Culture=neutral, PublicKeyToken=d55d733d2bfd5065”中的类型“ayh”的方法“ua”没有实现。'",
  "StackTrace": " 在 GrapeCity.ActiveReports.Document.PageDocument.Render(IRenderingExtension renderingExtension, StreamProvider streams, NameValueCollection settings, Boolean forceDataRefresh, Boolean forceParameterDataRefresh, CancellationToken token, IProgress`1 progress)\r\n 在 GrapeCity.ActiveReports.Document.PageDocument.Render(IRenderingExtension renderingExtension, StreamProvider streams, NameValueCollection settings)\r\n