title: Excel keep loading my spreadsheet with an error
body: <p>I keep getting this error when I load my spreadsheet. It makes me repair it, which strips all the validators. The file is saved as an xlsm.</p>
  
  <p>"Excel found unreadable content in '' Do you wnat to recover the contents of this workbook. If you trust the source of this workbook, click yes"</p>
  
  <p>You have to click yes or it won't load. Then I get this error.
  "Excel was able to open the file by removing or repairing the unreadable content
  Removed Feature: Data validation from /xl/worksheets/sheet1.xml part"</p>
  
  <p>I haven't a clue about this, and it's really annoying. If anyone has any suggestions, I would be very grateful. Thanks,
  James</p>