Originally Posted by Fiberwalker

I did try to check in multiple times online and in the app, it wouldn't let me. I kept getting notices that I should check in via email but when I'd try the app would say "Check-in not available" and it had an error that said the booking was not properly issued or something like that.

I did not try to resolve or check-in at the airport on Monday for my return. Just checked in and flew my alternative flight home.