I am a big fan of OneDrive desktop client. But I have experienced many times that it keeps on failing to sync Office documents with OneDrive. Recently I uploaded a set of files and the sync failed with the message “An office file needs your attention”. When I opened the Office upload center it simply says “open the file in office”. When I opened the file in the relevant office application and save it from there it uploads without any issue.
Luckily I found this article which solved the problem. Now the files get uploaded without any issue.