"There is a problem with your environment because the Application Express files are not up-to-date!" Error After Upgrading APEX

On my Autonomouse Database i got this error..

Oracle Support.. : "There is a problem with your environment because the Application Express files are not up-to-date!" Error After Upgrading APEX in the Database (Doc ID 2932174.1)”

And Solutions for Autonomouse

https://blogs.oracle.com/apex/post/running-customer-managed-ords-on-autonomous-database-heres-how-to-get-ready-for-apex-211-upgrade

So i decided to create an scheduler job:

But not within an Procedure is it allowed.

CREATE OR REPLACE PROCEDURE update_apex_image_prefix AS
    v_current_prefix VARCHAR2(255);
    v_new_version    VARCHAR2(20);
    v_new_prefix     VARCHAR2(255);
BEGIN
    -- Get the latest APEX version
    SELECT version_no
    INTO v_new_version
    FROM APEX_RELEASE
    ORDER BY version_no DESC
    FETCH FIRST 1 ROWS ONLY;

    -- Construct the new IMAGE_PREFIX value
    v_new_prefix := 'https://static.oracle.com/cdn/apex/' || v_new_version || '/';

    -- Get the current IMAGE_PREFIX
    SELECT APEX_INSTANCE_ADMIN.get_parameter(p_parameter => 'IMAGE_PREFIX')
    INTO v_current_prefix
    FROM dual;

    -- Check if the IMAGE_PREFIX needs to be updated
    IF v_current_prefix != v_new_prefix THEN
        -- Update the IMAGE_PREFIX if it's different
        APEX_INSTANCE_ADMIN.set_parameter(
            p_parameter => 'IMAGE_PREFIX',
            p_value     => v_new_prefix
        );
        COMMIT;
    END IF;
END;
/

I got this error if i create a procedure..

LINE/COL  ERROR
--------- -------------------------------------------------------------
17/5      PL/SQL: SQL Statement ignored
17/12     PL/SQL: ORA-01031: Keine ausreichenden Berechtigungen
24/9      PL/SQL: Statement ignored
24/9      PLS-00904: Ihre Berechtigungen reichen nicht aus, um auf Objekt PUBLIC.APEX_INSTANCE_ADMIN zuzugreifen

trying it in dbms_scheduler as plsql block it works:
HAAPY IMAGE S

-- Step 2: Create the Scheduler job to run the procedure regularly
BEGIN
    DBMS_SCHEDULER.create_job (
        job_name        => 'update_apex_image_prefix_job',
        job_type        => 'PLSQL_BLOCK',
        job_action      => q'#declare
    v_current_prefix VARCHAR2(255);
    v_new_version    VARCHAR2(20);
    v_new_prefix     VARCHAR2(255);
BEGIN
    -- Get the latest APEX version
    SELECT version_no
    INTO v_new_version
    FROM APEX_RELEASE
    ORDER BY version_no DESC
    FETCH FIRST 1 ROWS ONLY;

    -- Construct the new IMAGE_PREFIX value
    v_new_prefix := 'https://static.oracle.com/cdn/apex/' || v_new_version || '/';

    -- Get the current IMAGE_PREFIX
    SELECT APEX_INSTANCE_ADMIN.get_parameter(p_parameter => 'IMAGE_PREFIX')
    INTO v_current_prefix
    FROM dual;

    -- Check if the IMAGE_PREFIX needs to be updated
   -- IF v_current_prefix != v_new_prefix THEN
        -- Update the IMAGE_PREFIX if it's different
        APEX_INSTANCE_ADMIN.set_parameter(
            p_parameter => 'IMAGE_PREFIX',
            p_value     => v_new_prefix
        );
        COMMIT;
  --  END IF;
  dbms_output.put_line('YES');
END;#',
        start_date      => SYSTIMESTAMP,
        repeat_interval => 'FREQ=DAILY; BYHOUR=2',  -- Runs daily at 2 AM; adjust as needed
        enabled         => TRUE
    );
END;
/