Help with Word run time error 76 in Windows 10

Hey guys, so i installed Office 365 on my Window 10 machines. I thought it would be good to uninstall the older Office 2016, and clean the registry first with ccleaner and then install office 365.
After some windows updates, in a regular cleanup with ccleaner, I may have cleared something that I shouldnt in the registry. As a result, for all the Windows 10 machines all suffer the same runtime error.
But I am only showed the options “End” and “Help”, with no option to debug.

Functionally, Word works. It is just that at start up of the application, the error window would pop up, it is qute annoying…I would like to resolve it.

And yes. uninstalling and reinstalling it doesn’t solve the problem