Nemory Studios tweeted today that Facebook Messenger for BB10 app is getting updated with some fixes.
The new update fixes Headless hub bug and Facebook error message. Follow the tweet and Instagram instructions, Nemory asked users to uninstall the app, and reinstall it if you want the app to work fine.
Go to BlackBerry World and update Facebook Messenger for BB10.
New Update for Facebook Messenger for BlackBerry 10. Fixed “Headless Hub Notifications” and fixed the “Facebook Error Message”. Please uninstall then reinstall to fully propagate the changes especially for Headless to work properly. Thank you very much!