You have to have both an AOL and Apple specific one time passcode do the password issue could lie with either Apple or AOL. Further the AOL password still works with the OS devices that were not updated to OS 18.2. Contacted AOL, they provided suggestions none of which get around the password error. Finally, even with the help of AOL it was not possible to add the CalDAV AOL calendar back to the device which the AOL calendar was deleted. You never even get to the password incorrect step as you cannot even add the calendar. You get an error stating adding the calendar failed.