The developers are aware of these issues and problems in the game and are already fixing them! There is no need to contact technical support regarding these problems unless otherwise stated in the problem description.  

Facebook/Portal/MS Store

General gameplay

ISSUE: Black or white screen issue—game stops responding/lags
STATUS: Being fixed

ISSUE: Buildings' tooltips do not reflect the profit increase due to decorations, although the actual profits are adjusted correctly
STATUS: Being investigated

Cellar Quest

ISSUE: An animal's task is marked as complete, but it is impossible to collect the reward.
STATUS: Being investigated

Train Quest

ISSUE: The quest icon remains on the game screen after the event ends.
STATUS: Being investigated