Update to my post, above:
The first error occurred immediately after I turned ON NVIVIA Surround PhysX mode. At that point, after trying all known Repair tools (and also deleting the “wgs” folder within AppData), I had to uninstall and Re-Install MSFS2020 Clean. And that Fixed the initial error.
However, I’m now experiencing the SAME Missing Essential Packages Error, after Turning OFF NVIDIA Surround PhysX engine, as that Stretches out the left and right screens in a triple screen Config.
I realize that MS will undoubtedly include a better multi-screen spanning config editor capability within the new MSFS 2024, that’s to come in the next few months. However, there MUST be a better way to switch between Spanned monitor setups and back without having the re-install MSFS2020 Every time.
Has anyone else solved this problem, consistently?