I am new to pubcoder. We have an ebook with artwork, so the images I used were high quality since I found that pubcoder reduces the images to the appropriate size for the output.

I have read aloud audio files that all seem to work fine.

I have inserted 3 videos, but they are mp4's not from youtube.

I consolidated everything.

I cannot figure out why pubcoder says "Epub Validation Failed" Is there a way to get more information as to WHY it failed?

It is a pretty big file because of the images.