New Post: Unable to use Save / SaveAs TypeLoadException

Hi,

Many thanks for all your great work on this but I seem to have come up with an issue when saving a file. I get the following error:

Could not load type 'DocumentFormat.OpenXml.Spreadsheet.SmartTags' from assembly 'DocumentFormat.OpenXml, Version=2.5.5631.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

Code is as follows:

        var wb = new XLWorkbook(filename);
        var ws = wb.Worksheet("All DATA");
        ws.Cell("BH4").Value = "Result";
        ws.Cell("BI4").Value = "Validations";

        wb.SaveAs(filename);

Excel file was written in Excel2010

Im using:
.NET Framework 4.5
ClosedXml 0.69.1.0
DocumentFormat.OpenXml 2.5.5631.0

Please could you assist me and point me in the best direction?

Many thanks

Tish