Trigger underlying code no longer works correctly. Stored Proc / DBMS_JOB.Submit

We are past a Windows 19c DB upgrade and some functionality seems to have changed in our environment. Currently have a trigger that was executing a procedure in a package:

Before Update

 IF UPDATING

 THEN

  IF :old.acct_disabled_indc <> :new.acct_disabled_indc

  THEN

   IF (:new.acct_disabled_indc = 'Y')

   THEN

    l_action := 'LOCK';

   ELSE

    l_action := 'UNLOCK';

   END IF;

   l_what :=

     'SYSTEM.TAS_USER_MAINT.LOCK_UNLOCK_ORACLE_USER('''

    || :old.emp_id

    || ''','''

    || l_action

    || ''');';

   DBMS_JOB.SUBMIT (JOB => l_job, WHAT => l_what);

This stopped working, not sure why after the 19c Upgrade. So, I attempted to rewrite as an execute immediate of the package procedure itself... this also fails.