Ftp ride not logging

Hi wondering if someone can help me please. I’ve been doing the 6 week ftp builder, slowly! All well. But on week 4 ride 3 it just will not log that I’ve done the workout. I’ve done this 3 times now. I don’t want to do it again I want to move on! Workout is uploading to Strava so I know it’s saved. Can anyone help please and thanks in advance