Treasure Upgrade Issue

I get message "Not enough Souls". There's no Soul Requirement listed anywhere and I've over 100 Souls. It doesn't even say how much is required. I do have a duplicate.

I think getting a duplicate is the only way to upgrade it. I'm not sure though.

Did u read patchnones dudes? Do u read description in game? R u really blind, or u trolling? Treasures can upgrade ONLY duplicated (spent 100 souls for buying treasure)

Please remove treasues system. :((