Make sure your game has the latest version installed. Please see the steps from the links provided below:
For Windows 10 PC/Laptophttp://zynga.my/1SNChxW

In case you're still experiencing the issues after updating, you may try these troubleshooting steps if you haven't done it yet:

For Windows phones/tabletshttp://zynga.my/FV2CEWindowsPhone
For Windows 10 PC/Laptophttp://zynga.my/1SNChxW

Furthermore, older models of the iPad and iPad Mini do not support all features of the game which may lead to crashing.