This issue has been fixed on Nokia X6-00 software version 21.0.004.
The error: There are currently network problems. Please try again later is displayed when performing the Share Location to Facebook on Nokia Ovi Maps and if the login has been manually set in the Nokia Ovi Maps account.
To repair you should allow an automatic login to the Nokia Maps Ovi Service.
The problem appears on Nokia X6-00 software version 20.0.005. To check the software version enter *#0000# on the Telephone on the phone home screen.