The ValidatePrivileges script fails with an ORA-06550 Error code. The DBO user - user account could execute DBMS_SQL package (built-in PL/SQL package). This user could not see this package and hence the error "PLS-00201: identifier 'DBMS_SQL' must be declared" and this results in ORA-06550 error.
DBMS_SQL is a PUBLIC SYNONYM for the DBMS_SQL package which resides on the "SYS" schema. Either the public synonym has been removed or the EXECUTE permission of DBMS_SQL from the "PUBLIC" schema and therefore the foglight user cannot access it.
