Re: unable to install facebook due to error
Apparently this is due to some folder 'leftovers'... Did you have Facebook installed already or before? This from an XDA thread, might help. Note that the example is for Whatsapp, but the same should work for Facebook (just replacing the data folder for the latter).
Solution:
Method 1 (Sure Fix but requires root):
Install a file manager like Root Manager
Browse to internal storage android/data/com.whatsapp
Delete the com.whatsapp… folder
Now install whatsapp from Google Play
Method 2: Removing Junk Files via Cleanmaster
Install cleanmaster
Uninstall Whatsapp
Now run Cleanmaster , search for Junk files and clean them. (Make sure to uncheck important files that are detected as Junk files by Cleanmaster)