I need help with fracture Tenrai

Hi guys, i need some help with the current event! Tenrai. I have 4 items left to unlock but only ONE chalenge left, what does that mean? I wont be able to unlock the rest? AFAIK this is the last week right? Did i do something wrong?

There will be 3 more weeks, so don’t worry, you will easily be able to unlock everything :wink: