Is the "next" button disabled or don't you see one? If it's diabled, turn off any ad blocker you might have on for Airbnb. If it is not showing, that means it is a static page, not a page you need to move on from. Is it one of the tabs at the top of the listing page? They do not have "next" or "save" necessarily.
If it is not any of these, log a technical bug here: https://www.airbnb.ca/help/feedback. If you search for answers in the Help Center, you may be able to find a solution or answer