Can't enter Darkrai Cult Base

There are no stairs for me to enter the Darkrai Cult Base. I beat the Infernal Cult and shall now go here but how am i supposed to go up? Werent there stairs before?

You need to go to Narra town first.

Okay, but how do i get there? i thought you get rock climb post game

Nope, to Deryaan town, there is a manaphy statue on top of a waterfall.

Got it thank you very much

How do i get up the mountain though?