180 objects are invalid in pre-requisite even after running utlrp.sql while upgrading oracle 12c to 18c.
When running EXECUTE DBMS_PREUP.INVALID_OBJECTS, I am getting APEX packages in the output which I have upgraded from 4.2 to latest 19. See more details here :
I don't think you're going to be able to get around this, as APEX 4.2 is not certified with Oracle version greater that 12.1.0.2