Hello Kirrwed, thanks for coming into forums. I'm Myk, an Independent Advisor and I'll be more than happy to help you.
What happens after tapping the Facebook account listed within the Authenticator app?
Also, can you be able to provide a screenshot of the Authenticator app icon itself?
Meanwhile, please try to check if there's any pending apps update by following the steps below:
- Open Google Play Store
- Tap on your profile at the top right > Go to Manage apps and device
- Check for updates and Update all pending apps in it.
- Restart your Mobile phone afterwards
If you require any further information, then please don’t hesitate to get in contact. I will be more than happy to assist you further.
Kind Regards, Myk