There's a number of ways to fix that 🛠️:
1️⃣ Restart your device and reenter the game.
2️⃣ Make sure your game is updated to the latest version.
3️⃣ Make sure your device software is updated to the latest version.
4️⃣ Delete the game from your device and redownload it from the corresponding application store. Don't worry: your game progress won't be lost as long as your device is connected to the Internet.
5️⃣ Make sure your device meets the minimum system requirements.

🙅‍♂️ If the problem persists, contact our customer support. Provide the following information if possible:
🌿 What actions crash/freeze your device.
🌿 The first time you noticed the problem (after updating the game, when reinstalling it, etc.).