I had the same problem. It's because of the "?" at the end of your page name (in "lad?".) It causes the work-page PDF submission to stop "finding" (regular-expression-style???...) before the question mark, I'm guessing- or something... (and there is an error on the edit page, I think- or there was with mine- on the submission page you may find that "(Tomkins, Thomas)" is lacking - so of course, nonexistant page. Though adding that manually doesn't help...!
Let me move to a page without a "?" if you can't
... Never mind, I see already done!