Some users of Web Author have reported that after pressing the 'View HTML' and 'View PDF' buttons, nothing happens. The output doesn't appear. In some cases this may not happen all the time, just occasionally. The cause of the problem was their browser's popup blocker.
In Chrome, when a popup is blocked, a small image of a popup window with a red cross next to it appears in the address bar, as shown above. Click on it and select 'Always allow popups from https://businessoptixhosted.com' and press 'Done'. Other browsers have similar options to allow popups.