If you did FL within the past 24 hours, it won't let you because you can only take the quest once a day.
That shouldn't be the case since the logs don't have FL noted for yesterday, unless of course a GM forgot to note it.Are you sure you're taking the correct quest?
Nevermind I just found it, my bad. It was 1am, I guess I misread the date, checked a few times though.
There's been FL everyday this week.