EPUB Checker

[Mahmoud Kenawy]

Hello

after I finished my EPUB file, I run the checker and I have found this error in the screen shot, I know the error is in cover page

but I really don't know what should to be next, any one can help me

[Derek Cross]

You should export to ePub version 3.0. Not saying though that will resolve your issue. Perhaps check how you select the cover (None, Rasterise first page or Choose image).