ORA-04063: view "SYS.KU$_CLUSTER_VIEW has errors

We have  seen couple of errors while exporting the dump . Could R&D please check it out.

Command : expdp userid=\'/ as sysdba\' directory=DATAPUMP_DIR DUMPFILE=EXP_LOVJT1DV_May102019_%U.dmp logfile=exp_LOVJT1DV_May102019.log   SCHEMAS=WFM

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.FETCH_XML_OBJECTS [ORA-04063: view "SYS.KU$_CLUSTER_VIEW" has errors

ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105

ORA-06512: at "SYS.KUPW$WORKER", line 12098

ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105

ORA-06512: at "SYS.DBMS_METADATA", line 9039

ORA-06512: at "SYS.DBMS_METADATA", line 2792

ORA-06512: at "SYS.DBMS_METADATA", line 3423

ORA-06512: at "SYS.DBMS_METADATA", line 4760