Wait... does this mean we can still get all rewards even if we cannot complete all tasks for one week? Because I'm unable to complete week 3 as well - I went into CaS because one of my Sims needed new clothes, and when I went back into live mode, the remaining quests (go fishing with bait, travel to the Magic Realm) were gone. Fun fact: I still got all the rewards except the batfish which really doesn't make any sense because, like I said, I didn't complete all tasks.
When I go to the event page, it shows that I haven't completed all the quests - the one with "fish for the first ingredient" is still shown as active. In live mode, it's not there, though, plumbob is gone, too.
If I'm able to continue with next week's tasks, I'm fine with this, I guess, but if it broke the whole event, it'd be real bummer.