Just sharing a tip for fixing the normal.dot file when it's corrupted (Ms Word says it cannot save it when you quit the program). This happens to me quite often, don't know why...
You have to delete the normal.dot file in your home (user name) folder, here:
…/Library/Application Support/Microsoft/Office/User Templates/
…/Library/Group Containers/UBF8T346G9.Office/User Content/Templates/
Then MsWord will create a new normal.dot file.
It works here, with Office 2016 for Mac.