Tried mobile app as well. must be something with my specific booking. Crashes for me after I select my seats with the following messages:


Sorry, there seems to be a problem

We're sorry, there has been an error in completing your check in. Your travel document details and seat selection have been saved. Please try again and if the problem persists, proceed to the airport where our staff will be happy to check you in.

I called MP and they couldn't find anything wrong, they just said check in at the counter instead.