I've lost hours due to this issue and it's been happening since 8/20 for me.

Like others here the SPG linked account works just fine (just tried that this morning), but unfortunately for me is not what I primarily use.

At this time there is no solution that has worked enabling me to access my Marriott Rewards account. If this ever gets fixed for me I'll update this thread.

- Reset password 10x

- Have tried all of these browsers and OS: IE 11, Chrome (Android and Windows) and Safari (iOS) with all still throwing the "unprocessible condition" error

- Marriott mobile app throws the "connection error" when trying to access My Reservations

- Marriott mobile app only returns Sheraton brand hotels

Good luck everyone!