After converting to html to epub, file won't open.
As a new Sigil user, I tried converting an HTML file to ePub. After saving it in Sigil, I tried to open it with Cool Reader (PC version), and got an error "Error while opening document".
How can I determine what the problem is and correct it?
For what it's worth, I tried clicking the Validate button. It comes up with a single issue:
OEBPS/Test/logo.jpg
This resource is reachable but not present in the OPF <manifest>.
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