EMBYRR922'S PROFILE

I've beaten both the bosses on level 3 of Colorous Cave, but I can't figure out how to use the rope ladder. I've found the spot with the little sparkle where it says "This looks like a spot where you could use a rope ladder." but I can't use the rope ladder there. I've tried interacting with the spot with the ladder in Reniat's inventory, I've tried interacting with the spot with the ladder in the party storage, I've tried standing on the spot and attempting to use the ladder from the inventory and nothing seems to work. Am I missing something obvious, or is my game bugged?