Facebook App Not Working after Update
Edit: this appears to be a concern that Facebook know. It's an issue with the Facebook application, as well as not a generalised Play Store issue.
This is what helped me a minimum of.
- Settings > Applications > All > Google Play Shop, Clear data and also Clear cache
- Settings > Applications > All > Google Play Services > Manage room, Clear all information as well as Clear cache
It does not harmed if you reactivate your phone prior to you attempt updating facebook again. And, the install was SLOW. Just at least 4-5 minutes. Yet, it did job. Otherwise attempt to uninstall it, or simply await a solution.