Error message when trying to deliver ibooks package
(Tried posting this in the Delivery section of the Books discussion but no response there)
I am trying to deliver my book (created in iBooks Author) to the iBooks store. I get an initial message that my package has been validated but at the end of the process I get the following message:
ERROR ITMS-9000: "OPS/ibooks.ncx(5): element "content" not allowed yet: missing required element "navLabel"" at Book(CMZltmspBook Package)
What does this mean and how can I fix it?
Is there a glossary somewhere that explains these error messages?
Should I email Apple support about this issue?