Why am I no longer a part of the flight?

I downloaded yesterday & have been playin since. Been playing all morning too, then server crash. Went to dashboard the game, and upon rebooting I get a message on the Home Screen: ‘attention your account is not authorized to play halo Infinite’. Like what the heck?

If you are on console, have you tried power cycling it by fully shutting it down? That might resolve the issue.