After uploading an ePub file to NookPress.com,an error appeared which said "An Error Occurred Processing Content FATAL:referenced resource missing in the package"
I have checked my HTMLs,Content.opf & ncx files and found no such problem in data, I have tested my ePub file with ePub checker,It is showing nothing wrong with the ePub file created by me. If anyone faced the same issue & would able to resolve it,Do let me know,I have been tangling with this problem since long.
Thanks
I wrestled with this same problem for most of a day. Finally, I submitted my EPUB file to EPUB Validator (http://validator.idpf.org/), which will give you more information about what the problem is exactly. In my case, I did not put "http://" in front of my website in an anchor tag. I had some other issues, too, but these were mainly warnings that I went ahead and stamped out.
Hopefully, this will help you out and get you over the hump.