Fortnite bug with extension tasks can someone

I've just completed 13 extension tasks in Fortnite, and I've completed 13 tasks to complete as a picture, but the task is to "complete free extension challenges to unlock the Season 8 Battle Pass." 12 out of 13, anyone knows or does how to fix that, if so, I would be glad about an answer

Just do another mission, then it will work.

You need to do a task again, I wondered because of that