Try out the following steps to fix this issue:
  1. Ensure you are connected to fast and stable Wi-Fi
  2. Ensure you have entered your correct Facebook details
  3. If you have the Facebook app installed on your device, trying logging out and back in again. Then try to connect to Facebook again from the game
  4. If you don't have the Facebook app, install it and see if that helps
Should you still have issues after that, make sure to contact us.