I have the same problem with saving word documents and don't have any COM add-in enabled. Is there others solution to resolve this problem. This is no solution to uninstall the 1809 update. I have two diffrent stations with the same windows (10.0.17763-17763) and Office 2016 and only one of them I recognize this problem. On the second one I can even enable com add-in.
Please find out the solution.