We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
Trying to convert file to EPUB. Help!
So, I'm getting the dreaded 'Please review your EPUB against the Troubleshooting chapter of our eBook creator guide' message.
I am certain that my document meets all the requirements, but no matter what I do, it's still not accepted.
File is here: https://1drv.ms/w/s!ApHaPJ3SjihagbAKqvmraZyp_VIwAg