las cavernas del tiempo -Alchemy

There is an error in this mission, which can not be completed. Everything he says is done and the quest is not completed. And it is necessary for me to complete it, to be a master of elixirs. I want help please, I'm still trying but I'm waiting for an answer.
I do it both as a group, as a solo.

Ok my friend. First of all, you need to go to "my computer" and search for the place where you downloaded the game. Then, you will have to enter the folder and press uninstall. Then your problem will be solved! Hope it helps, good luck!