Unable to log in to Battle.net via Facebook on iPad

Hello,
I’m having trouble logging into my Battle.net account on my iPad 10 using Facebook login. When I click the Facebook option, the pop-up window says the login was successful, but I’m still not logged in on the main window of the app. The only available option afterward is to click “Cancel.” As a result, I can’t access my account, and the Hearthstone app doesn’t connect to Battle.net either.

I’ve tried restarting the app and my device, but the issue persists.
Could you please help me resolve this?

Thank you in advance!