Something weird happened to an epub I'm working on.
It still looks OK in Sigil, except no image displays when I click on the page cover.xhtml. When I click on the epub icon, it doesn't open in iBooks. So I drug it into Pagina, and got this error message:
File 'META-INF/container.xml' could not be found
I've Googled for help but haven't found anything useful yet. It appears to reference a distinct page named container.xml, but I can't find such a page in my working epubs. I did a search for the text container.xml in my working epubs and again drew a blank.
Does anyone know what this error message means and how I can fix it?