[SOLVED] [ANDROID] How to Fix the Install or the Update of the Facebook App: Error Code 504 in Google Play Store

If you're having trouble installing the latest version of the Facebook for Android app, you are in the right place.

While trying to install Facebook via Google Play store, you can read sometimes this error message:

Can't install app. "Facebook" can't be installed. Try again, and if the problem continues, get help troubleshooting. (Error code:- 504). 

The error code 504, is not an issue with the Facebook app, and not a generalised Play Store issue. To solve the problem, try these troubleshooting tips:

• Settings > Apps > All > Google Play Store, Clear data and Clear cache
• Settings > Apps > All > Google Play Services > Manage space,Clear all data and Clear cache
• Restart your phone 
• Try to update or install Facebook again.