I've run into an issue with MSFS 2020, presumably since the last update.
Every time I start the sim I'm presented with the initialisation parameter screens.
After completing them I can enter a flight.
But after exiting and restarting, I am presented with the initialisation again.
I uninstalled then reinstalled the sim via the Xbox app, but that made no difference.
As part of the flow, I am given the option to load "Essential Packages". If I try to load them I am returned to the initialisation screen, eventually being presented with a blank update screen, at which point the process locks.