Facebook Won't Update
Edit: this seems to be an issue that Facebook understand. It's an issue with the Facebook application, as well as not a generalised Play Shop issue.
This is what benefited me at least.
- Settings > Applications > All > Google Play Store, Clear data and also Clear cache
- Settings > Apps > All > Google Play Provider > Manage room, Clear all data and also Clear cache
It does not harmed if you restart your phone prior to you try updating facebook once again. As well as, the mount was SLOW. Just at least 4-5 mins. But, it did job. Otherwise try to uninstall it, or merely wait on a repair.