Same reset required for me - really unhelpfully just before a flight. The app doesn't tell you any detail, just doesn't let you in.

Then, as I was locked out, on board wifi wouldn't let me log in! It suggests to try again or if it doesn't work log in as a guest, however once you click the 'guest' option - you can't go back to the skywards login - no matter what I tried!

So epic Wifi fail for me yesterday oh well, I drank instead!