Why won’t my mahjong city tours open?

Has you had a game update recently? It is possible some updates will cause problems with the game. Possibly only on some devices. If not then you can check your device and make sure the storage isn't full as this can cause problems for running apps.

If you continue to have problems please report it to the game developers as they will be the only ones to be able to check and confirm if there is a game issue and they will need to fix it. Check the support page for the developers contact options.