Originally Posted by
irishguy28
The API (advance passenger information) could have been given at any time after making the booking. It's at least possible that the fact you are only inputting this information now might be part of the reason for the error.
API information was already entered by the TA when the booking was made, so that should not be the issue, but the connection to whatever system was probably down as both sex and the passport data was not displayed on the previous attempts.
Seems however it was a temporary issue as I am now in the process of checking in - still slow, but I am at the point where the upgrade offer is made (this is why I was so keen on the online-checkin).
But thanks for your suggestion!
Greetings - Dirk