! [7] Notice

Beginning today (it has been quite some time since I last opened the program,) this appears when I first open SketchUp. Any idea what it means?

SU 2020, Windows 10. No hardware changes from before.

SketchUp7

I updated the extensions for which updates were available, and the notice no longer appears. Had I realized that those updates would cure the problem, I would have done one at a time to see if I could pinpoint which one caused it.