ORA-12012: error on auto execute of job “SYS”.”ORA$AT_OS_OPT_SY_**"

I got this error at alertlog on Oracle 18c Database.Complete errors are: There is an error in the Oracle alert log file!\nORA-12012: error on auto execute of job “SYS”.”ORA$AT_OS_OPT_SY_111029″ORA-20001: Statistics Advisor: Invalid task name for the current userORA-06512: at “SYS.DBMS_STATS”, line 49565ORA-06512: at “SYS.DBMS_STATS_ADVISOR”, line 881ORA-06512: at “SYS.DBMS_STATS_INTERNAL”, line 21631ORA-06512: at “SYS.DBMS_STATS_INTERNAL”, line 23763ORA-06512: at… Continue reading