Oh, that wasn't supposed to happen. If you're seeing an error message that you weren't expecting, then this article will help you find a resolution and help prevent it ever happening again.
Prezi Classic can handle pretty much every kind of image, video, or sound file, but if you want to check if the file type you're using is on the list, click here.
Got an error message when trying to insert a YouTube video? No need to panic, just read this article.