What is the exact potion needed to complete the chemist challenge? The description does not tell you and I have tried every variation of a regen potion (potion on the achievement) and it will not work. Anyone have a clue here?
Some challenges in /challenges are bugged/broken so you can leave them until they get fixed in the future
They should be fixed soon. Collect all the items ready when they fix that bug. I recommend getting all the items for the challenges as all say completed.