I think I figured my problem out. I had multiple image files in the ePub package that had spaces in their names. Sigil understood this in the HTML coding by adding %20 but the file names still had spaces in the images folder. When I renamed them without spaces: like title_page.jpg the file uploaded successfully. Sigil was even smart enough to know to change the image name in the HTML for me so I didn't have to change them myself. Such a simple solution, really, but absolutely NO indication in the error messages that that was the problem. What a relief!
|