Error with oracle database

[dyar74]

Database Exception – yii\db\Exception
ORA-00942: table or view does not exist
The SQL being executed was: SELECT
USERNAME
FROM DBA_USERS U
WHERE
EXISTS (SELECT 1 FROM DBA_OBJECTS O WHERE O.OWNER = U.USERNAME)
AND DEFAULT_TABLESPACE NOT IN ('SYSTEM','SYSAUX')
↵
Caused by: PDOException
ORA-00942: table or view does not exist

WHERE O.OWNER = U.USERNAME this instruction not needed to oracle