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

ISSUE: Different building types (Flea Market, Music Store, etc.) may conflict when attempting to place them on adjacent plots.
STATUS: Being fixed

Islands

ISSUE: Game freezes after completing 4 orders in Delivery Service on the Islands
STATUS: Being investigated