I'm receiving Apple validation errors for an ePub I created, though it's passing ePub check without errors. The book compilation of existing ePub files, which I combined using Calibre. I'm not really an expert with this at all, so I appreciate any help anyone can provide.
9000: "9781633690943.epub: Invalid URI in manifest 7/OEBPS/content.opf : The manifest should not include the OPF file" at Book
This message occurs once for all the books in the compilation, but I'm not sure what I should be looking for/where in the OPF I should be looking. I've copied what may be the relevant part.
9000: "9781633690943.epub: Item referenced in encryption.xml could not be found in the OPF manifest" at Book
The META-INF folder does contain an "encryption.xml" file, along with "com.apple.ibooks.display-options.xml". I admit I don't really know what these do. The book does use embedded fonts, which weren't showing up on all places, and this seemed to fix it. Do I need to declare the "encryption.xml" file in the OPF? The "com.apple.ibooks.display-options.xml" isn't declared and that didn't seem to throw any errors.
Thanks for any help you can provide.