How to Fix iTunes Download Error? Part 4. Why Does iTunes Download Error Happen? Part 3. What Does iTunes Download Error Mean? Part 2. In this article, you will learn the quick fixes to apply when you encounter iTunes download error and other possible causes that may have triggered this problem. ITunes download error happens to almost every iOS users who are downloading their purchased songs, movies, TV series and more from the iTunes Store and it is quite a hassle when you just don’t know what this error means and what should be the process to resolve and avoid it. I was not able to download a single song I just purchased. Tap to retry” This message keeps popping up every time I try to buy music from iTunes Store directly to my iPhone. How do I fix iTunes download error? “ Download Error.