What is OLE:RemoteTemplateinj[Trj]

When I tried to open an XLSX file (my own file used many times) I got this message from AVG antivirus stating OLE:RemoteTemplateinj[Trj]  infected with malware and the file was quarantined.  What is the OLE please?

Hi Hari,
Thank you for the reply.  AVG is fully up to date. I am unable to send the MS xlsx file as it has confidentail information.  This is a file I have used for years and does not contain any photos, just text and website addrsses and passwords. If I save the file as an MS xls 97 file, there are no issues.