Originally Posted by
GagaPilot
As a datapoint, departing CDG a few days ago ran into the same issue. App wouldn’t check us in, just kept a loop of error messages with the occasional “We’ve found your reservation, but check in must be completed by AF” (even though we were on solely DL metal).
That was a better app error message. The app never told me to try KLM. Maybe if I did a few more rounds it would have.