Also been getting this in SU9. Was stable Prior. It actually happened almost exclusively if I left the Sim sit at the main menu, I was completing bush trip legs/4hrs a day sim time without interruption.
It just did it one last time, and now on loading FS2020 does this and will not load at all.
Good job Asobo. The love/hate relationship continues.
Re the above, Going to Add/Remove programme, advanced, repair allowed the sim to start again.
Really sick of MS’s inability to sort out fundamental issues in this games memory handling.