If your game is crashing right away at the Rovio/Outplay splash screen, please note that we are onto this problem and that you might benefit from updating your game to the latest version in your app store. If the crashing persists, we are sincerely sorry for the inconvenience and hope you can hang in there until we deliver a solution.
If you are absolutely certain you have been playing AB Pop connected to your Facebook account before the crashing started, you could try reinstalling the game to resolve the issue. Please note that Pop saves progress only in connection to Facebook accounts and you will likely lose all progress irretrievably, if you reinstall the game without having been connected to a FB account. To proceed with reinstalling, please delete your current game app, reboot your device, download the game again from your app store and log back in with your FB account to access your personal progress level.
If reinstalling is not an option, please remain patient and wait for the next game update to cure the crashing or contact Support.