I have documented the warnings and notices I get in the drupal watchdog logs at this link:
I see nothing in apache2 error logs.
I see a WSOD with the message:
Not allowed. in the browser.
I see the 403 code in the browser inspect tool's js concole.
I also see that 403 in the apache2 access logs for every:
submitting the change for a specific user does not change the outcome.
Any thoughts on how I might debug this and resolve it would be appreciated.
Thanks, -- Hugh