I went into my bookmark list to see what was there, and decided to delete the two bookmarks I had created. That went fine, but after the second one was deleted, I got this error:
Seems like a weird error to get, given that there are no bookmarks anyway, if there were, they’d be mine, and I’m the admin of the site. 
Cosmetic, I know… When I return to that page, I get the proper message:
