[djkmann]

Hello, I am converting a Word DOC to EPUB using Calibre. I have used this process dozens of times and successfully submitted the EPUB to KOBO, however, this time it was rejected. The EPUBcheck validator reports:

RSC-005 (ERROR) Message: Error while parsing file 'element "base" missing required attribute "href"'.

Can anyone tell me what this means and how I can repair the issue?

Thank you