First of all, please make sure your Internet connection is up and running when you're trying to log into the app via Facebook, challenge your friends, and send/receive gifts. Try logging in and out of Farkle Live with your Facebook profile.
Or you can try the following (for iPhone, iPad, iPod users): go to your device 'Settings', select 'Facebook', tap your name, and click on 'Delete account'. Afterwards you will be able to sign into Farkle Live without issue. Then you can go back to 'Settings' -> 'Facebook' and resubmit your credentials.
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