No placeholder object for a web object
I inserted a web object onto a slide, configured it to point to a website, tested the link successfully and then published the lesson (not preview - I know web objects don't work in preview). There is no placeholder object on the slide and nothing happens when the presentation moves to that slide. I'm sure I'm missing something basic but I'd appreciate it if someone would point out what that is. It may be basic but it's not obvious, at least to me!