I am having problems uploading an epub file to Ingramsparks (fixed not flowing as I am uploading a picture book) as attached. I am advised that this is a coding issue. Accordingly can anyone confirm and if so would learning HTML/XHTML assist? Any direction would be very helpful.

Many thanks

I have tried googles epub version, i have tried various conversion software unfortunately there is always a problem. I was expecting doc to be uploaded without a prob