Tonight under My Trips, I got a 404 error! Then I tried to access it from another area - this time got Access Denied. This was on FireFox.

Opened a Chrome browser, I was able to go to My Trip but very slow. Took 2 tries to cancel a reservation. Thankfully the 2nd try succeeded and the reservation was canceled, even received an email confirmation on that. whew.

Meanwhile, FF remains getting 401 Authorization denied error even just trying to go to Marriott.com