SQL> select object_name, policy_name, enable
  2  from dba_policies where object_name = 'WRT_COVID19_SE_STAGING';

OBJECT_NAME                    POLICY_NAME                    ENABLE
------------------------------ ------------------------------ --------------------
WRT_COVID19_SE_STAGING         CODE_WRT_COVID19_SE_STA_POL_00 NO

SQL>

CREATE MATERIALIZED VIEW PEBTOWNER.PEBT_AGENTAPP_PEBT4_MVW
REFRESH FORCE ON DEMAND 
AS 
SELECT *
FROM WRT_COVID19_SE_STAGING sestag
WHERE sestag.project_grp_nbr IN (1250,1251,1255,1260,1261,1265)
ORDER BY CHILD_NYSSIS_ID,SCHOOL_BED_TXT
Error report -
ORA-30372: fine grain access policy conflicts with materialized view
30372. 00000 -  "fine grain access policy conflicts with materialized view"
*Cause:    A fine grain access control procedure has applied a non-null policy
           to the query for the materialized view.

SQL> select object_name, policy_name, enable
  2  from dba_policies where object_name = 'WRT_COVID19_SE_STAGING';

OBJECT_NAME                    POLICY_NAME                    ENABLE
------------------------------ ------------------------------ --------------------
WRT_COVID19_SE_STAGING         CODE_WRT_COVID19_SE_STA_POL_00 NO

SQL>

REFRESH FORCE ON DEMAND using TRUSTED CONSTRAINTS