I was getting the same error. I moved my python scripts into my
amazon content folder and still got the error. then I deleted the book, as I had downloaded it from an unsupported version of [url="http://amzn.com/gp/feature.html/ref=sv_kinh_1?ie=UTF8&docId=1000493771&tag=streami nmedia-20"]Kindle For PC[/url, and redownloaded. It worked with the re-downloaded copy. Hope that might work for you.