Originally Posted by Billygreg

Sort of same problem but with different wording. Mine says:

! We could not process your request. Please see the message below and make revisions.

! Please select at least one segment to be upgraded.

Of course I have selected the segment to be upgraded.

1k on a B fare and I get that response when I try to confirm my upgrade. Expert mode says PN4.

I get that phrase on the web. The app offers it to me as well but I just get in an endless loop there where I click to confirm and it kicks me back to the home page with no option to change my seat to first. Guessing this is typical UA IT wonkiness but.......