I did go into the store, found the add-in I wanted, but when I try to add it, I get a msg, there is an error, doesn't say what error.
When I go to the add-in screen, under office Add-ins it only shows MAY ADD-INS and STore, I do not see admin, which appears on my other mac computer2, I did a side by side, comparison of settings. I am having difficulty trying to add an add-in to my PowerPoint app, Version 16.43.