Can someone help? This is my 1st epub conversion. I'm not at all advanced with understanding error codes.
These are the codes I got after validating:
ERROR OEBPS/content.opf 7 14 Error while parsing file: element "metadata" incomplete; missing required elements "dc:language" and "dc:title"
ERROR OEBPS/content.opf 8 13 Error while parsing file: Exactly one manifest item must declare the 'nav' property (number of 'nav' items: 0).
BTW: those were "Line 7 position 14" and Line 8 position 13" errors
HERE IS MY Content.opf:
<?xml version="1.0" encoding="utf-8" ?>
<package prefix="rendition: http://www.idpf.org/vocab/rendition/#" unique-identifier="BookId" version="3.0" xmlns="http://www.idpf.org/2007/opf">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns
pf="http://www.idpf.org/2007/opf">
<dc:identifier id="BookId">urn:uuid:92f30da8-6af6-40fc-9de7-4dc7f73f68ae</dc:identifier>
<meta content="0.9.3" name="Sigil version"/>
<meta property="dcterms:modified">2019-04-18T14:00:43Z</meta>
</metadata>
<manifest>
<item href="toc.ncx" id="ncx" media-type="application/x-dtbncx+xml"/>
<item href="Text/Section0001.xhtml" id="Section0001.xhtml" media-type="application/xhtml+xml"/>
</manifest>
<spine toc="ncx">
<itemref idref="Section0001.xhtml"/>
</spine>
</package>