Please try for following stpes,
It's happen The target database user does not have the correct privileges to access needed sys tables.
1-Log on to the Oracle database as sysdba user and grant the following privileges to your user
SQL> grant all on sys.col$ to <userid>;
SQL> grant all on sys.obj$ to <userid>;
SQL> grant all on sys.user$ to <userid>;
2- Now restart the manager
GGSCS > stop mgr
GGSCS > start mgr
3- Now you can run the Replicat again.