Activity not saved when trying to play next film in the playlist

I finished the first film of the Alpine Challenge (Glandon) today and was prompted to "Save & Continue" which i selected. It then came back with an error that it could not load the next film in the Challenge but it advised that my file was successfully saved - but it wasn't. I cannot find an activity saved for the ride completed today.. The films were downloaded for the 1st and 2nd films in the challenge, but i can't see how that would affect things.

Back to dual recording on my 530 or 955 next time!

Any ideas again on how i can recover the missing file?