Surprised you had such trouble. I had to use one once, I tried twice, couldn’t get on either of them. Took pictures of both boarding passes and called crew scheduling. Following that I emailed cpo with the pictures and all was good. This was the same day I was starting work as well.

Flew in next morning to start sequence. I will say that this was for a dfw cpo which I have seen to be much more civilized and realistic with things.