Office 2016

Hi we are Bentley Promis-e users and have just tested one of our clients on Office 2016 ( O365) upgrade but we are getting an errorPromisE and Office 2016.rtf when doing an import from a spreadsheet .This happens even if we import an old spreadsheet created in Office 2010 or a new spreadsheet created in Office 2016. Is there a fix or do we need to upgrade Promis-e. ?