Could you please try the same with GoldenGate Director?
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.