I had MSFS 1.14.5 running this morning. I closed it to make a change to a livery in the Community folder and it no longer starts. It gets to the screen showing the 300 Extra (2 Landing Challenges) and the Bonanza (1 Iconic Flight) and stops with the progress bar at about 80%.
The Event Viewer (Windows Logs > Security) shows a number of audit failures indicating a firewall issue ("Windows Firewall was unable to notify the user that it blocked an application from accepting incoming connections on the network.") The process indicated is LSASS.exe.
If I disable the private network firewall, the audit failures don't occur, but MSFS still doesn't start.
Has anyone seen anything like this?