This is NOT the correct answer and really not the least bit helpful. Submitting a message on this forum was a last resort after going through the help section.
You should consider addressing this error message in the help section, as I've seen several people with this issue. In my case (after surfing around the message boards for over an hour), I discovered that I had to upload the exported website to my FTP to see the animations working. So, yes, they seem to have been integrated properly once the site was actually live, but when you preview your HTML file in the browser AFTER exporting, it looks like something is amiss and that really threw me off after I'd spent so much time creating the animations.
Again, the help section should indicate in a side note that you must go live with your site to fully test that your animations work properly. It would save people a huge headache.
Please refer to these threads for steps that you can try,