Make sure your device meets the minimum requirements for the game.
Make sure your device software is up to date. You can check that from device Settings menu.
Make sure your game is up to date. You can check that from your application store.
Turn your device off and on again.
Do not remove your game from your device. If you try all these and the issue continues, and you are sure your device meets the Minimum Requirements, you can contact customer support. Please include your device brand and model and a detailed explanation of the issue in your ticket.