Starting with SU6, I’ve been having all kinds of problems too.
First, something corrupted the update of Gaming Services, and I’m still not convinced it’s working right.
But at least it’s not throwing errors in Event Viewer. But, strangely, after a system restore, and FULL reinstallation of MSFS2020 from scratch, i’m still missing all of my Activity Flights - The Bush Trips, the Flight Training, Challenges, etc. Just blank screens. I checked and everything is up to date with Windows, MS Store, and the Sim. Nothing missing in the Content Manager. All of the files are in the “Official” folder in the game file structure. They just down show up in sim! Any ideas?