I can’t connect to Facebook!
The following was copied from the Supercell support page.
If you’re having trouble connecting the game to Facebook, you’ll want to double-check the following.
First, make sure you’ve installed the latest version of Facebook by entering the “Updates” bucket of the App Store.
When that’s all set, make sure you’re logged into Facebook the App, as well as in your Device Settings. To check the latter:
Enter your device settings
Find and enter the Facebook bucket > verify that you’re logged in with the right credentials
Launch the game again & check that your account is connected