Game not starting? (Microsoft Edition)

I still haven’t been able to get MSFS to load. It’s been working perfectly for me up until yesterday. Right after launching I get the black screen shown below with the spinning “waiting” icon. This never comes back.

I see no CPU, GPU, disk, or internet activity
I have nothing in my communities folder
Nothing has changed on my PC

Any ideas? Two days now and haven’t been able to launch MSFS. Opening a ticket with Zendesk but I already know they’ll just say to reinstall the program.

Tried looking for any startup logs or something - anyone know if anything like this is logged anywhere?

Getting frustrated!

Thanks,
Scott