This error comes when running ggsci on a linux or unix platform. Generally it is due to wrong setting of parameter LD_LIBRARY_PATH
$ echo $LD_LIBRARY_PATH
Edit the profile of the user and set LD_LIBRARY_PATH to $ORACLE_HOME/lib
LD_LIBRARY_PATH=$GG_HOME:$LD_LIBRARY_PATH:$ORACLE_HOME/lib; export LD_LIBRARY_PATH