I have just returned to playing the game but frustratingly I cannot access the ovens when a new challenge appears. I gave 6 gems to quickly build the flower bloom ovens but when the game directed me to them they remained locked. In the past you would get box with parts and would then work towards building them with parts from your neighbours. This new challenge, again I clock on buy; it takes me to the oven but it remains sealed. I cannot access it at all. It states goal and is greyed out. It?s very frustrating as I enjoyed this part of the game before and now I can?t. I?m getting parts from neighbours for nothing. I have sent in a error message but was re-directed to this forum. Can some one advise me if the process of building an oven has changed please. Thank you.