I'm unsure if that's from Facebook disabling your app or from something else (like a misconfiguration), but it's not a message we've seen before.Login Failed: You can't use Facebook to log into this app or website because there's an issue with its implementation of Facebook Login.
Is the issue you're having the same one I describe or something else?FB registration for new account still doesn't work .. I assume it's due to FB disabling functionality?
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