We are aware of an ongoing issue for iOS users that are unable to sign into the app via their Facebook account.
Here's a quick fix:
1. Open the Safari web browser, and open the Facebook website.
2. Log into your Facebook account.
3. Exit Safari and open the Spades Royale app.
4. In the left hand upper corner, you'll see the menu button (right next to your avatar).
5. Tap on the 'SETTINGS' button and connect your Facebook account.
Take a look at the attached video for reference.
For more questions, feel free to contact us!