ITMS-9000 Error - Unsupported Video
We recently tried to upload an iBook using iTunes Producer 3.0. We get two errors that refer to unsupported video, yet they point to files that are not video files at all. Here are the error messages
ERROR ITMS-9000: "Module_2_EngComplete-preview.ibooks: Book contains unsupported video Module_2_EngComplete-preview.ibooks:/OPS/assets/images/mediawidget-103-gutter.p ng. Could not detect ftyp. Please make sure you are using the latest version of iBooks Author." at Book (MZItmspBookPackage)
ERROR ITMS-9000: "Module_2_EngComplete-preview.ibooks: Book contains unsupported video Module_2_EngComplete-preview.ibooks:/OPS/assets/thumbs/content5/tiny/thumb-1.jp g. Could not detect ftyp. Please make sure you are using the latest version of iBooks Author." at Book (MZItmspBookPackage)
The files that are mentioned ('mediawidget-103-gutter.png' and 'thumb-1.jpg') were never used when creating the iBook. And we are using iBooks author 2.1.1 (459) which is the most recent version.
Any suggestions how to resolve these?