This is the second time I’ve encountered this same error. Each time it’s a result of me switching from NVIDIA Synch mode (combining all 3 of my 27" monitors into one Virtual ultra-wide config for Forza Horizon).
The first time I had to execute a complete re-install after trying both types of Repair Tools (Win 11 App Repair tool and the Repair tool included within the XBox App, mentioned above under My Library). I suspect that several of you have also changed your Video resolution or the number of monitors being reported to the MSFS2020 App.
Please tell me someone else has come across this same reason for the Runtime execution error Msg regarding “Missing Packages that are essential to run MSFS2020…” I really don’t want to have to blow away my complete installation and all the extra add-ons (well over 500GB AGAIN).