Was you default lineup used instead? If not, I gotta say, the log is empty for the match... Sadly, this is a real bug, and I intend to find out why it happens. So far, I think it's connected to failed economy runs, so teams that set their lineups on Sundays and Mondays while the economy runs can have their lineups "undone" somehow. Nothing remains, not even the log part.
Until I find a cause, it's just best to check a lineup after a couple of hours, that should confirm it (each countries economy run last for an hour at most, at that's for big countries, so it should be enough time to see if the update failed and had the tactics thing been undone).