On the right side, click Update Options, and then select Enable Updates. Start any Office 2013 or Office 2016 program. Make sure your version of Office is up to date with all updates from Microsoft. I have ran into this lots of times with different elements and different systems causing the issue so I am going to give you all the things that have worked for me. (Even if you check the remember me log in box). Office 365 asks for log in creditials over and over again.
