What to do???.

I've noticed something strange in the Atlas, specifically the unique map, Untainted Paradise. All the surrounding maps were made with success, but I can't access the map, considering I'm playing League, level 91. All the maps I play are T15 and T16.

Can someone please explain to me what I should change? Or if it's a bug? Why do I feel like an idiot after playing over 1,400 hours of POE 2?