[Mailman-Users] changing the error html page

[Elise Bonneville]

Is there a way to modify the error page that is displayed after a user
enters an non-subscribed email address on the listinfo page when trying to
modify their options? I modified the four html pages (listinfo, subscribe
results, options, options results) from the admin interface, but I cannot
find the option to change the error page.

If it is not possible to do so from the admin interface, how would I go
about this?

Thanks for your help,

Elise Bonneville