File not seen error

I'm working with an ePub file, and KindleGen is giving numerous warnings
about missing close tags, and (at least in one case) a real error that I
don't yet understand. (I'm having a little more trouble identifying files
and lines with ePubChecker.)

The KindleGen error is:

Error(core):E1005: Could not access file.
      in file: /tmp/mobi-KViwv6/OEBPS/title-page.xhtml


In the directory I zipped the ePub file from, there is an OEBPS/content.opf
and an OEBPS/title-page.xhtml:

*content.opf:*
<?xml version="1.0" encoding="UTF-8">
<package xmlns="http://www.idpf.org/2007/opf" unique-identifier="BookID"
  version="3.0">
    <metadata xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:opf="http://www.idpf.org/2007/opf">
        <dc:title>A Wonderful Life</dc:title>
        <dc:creator opf:role="aut">C.J.S. Hayward</dc:creator>
        <dc:language>en-US</dc:language>
        <dc:rights>© 1993-2017 by C.J.S. Hayward. Distribute
freely.</dc:rights>
        <dc:publisher>C.J.S. Hayward Publications,
CJSHayward.com</dc:publisher>
        <dc:identifier id="BookID"
           opf:scheme="UUID">C.J.S. HaywardWisdom Literature</dc:identifier>
        <meta name="cover" content="cover-image" />
    </metadata>
    <manifest>
        <item id="cover-image" href="cover.jpg" media-type="image/jpeg" />
        <item id="ncx" href="toc.xhtml" media-type="application/x-dtbncx+xml"
/>
        <item id="style" href="stylesheet.css" media-type="text/css" />
        <item id="pagetemplate" href="page-template.xpgt"
          media-type="application/vnd.adobe-page-template+xml" />
        <item id="titlepage" href="title-page.xhtml"
          media-type="application/xhtml+xml" />
        <item id="doxology" href="doxology.xhtml"
media-type="application/xhtml+
xml" />
<item id="letters" href="letters.xhtml" media-type="application/xhtml+xml"
/>
<item id="apprentice" href="apprentice.xhtml" media-type="application/xhtml+
xml"
 />
<item id="providence" href="providence.xhtml" media-type="application/xhtml+
xml"
 />
<item id="father" href="father.xhtml" media-type="application/xhtml+xml" />
<item id="money" href="money.xhtml" media-type="application/xhtml+xml" />
<item id="love" href="love.xhtml" media-type="application/xhtml+xml" />
<item id="meatspace" href="meatspace.xhtml" media-type="application/xhtml+xml"
/
>
<item id="sacrament" href="sacrament.xhtml" media-type="application/xhtml+xml"
/
>
<item id="commentary" href="commentary.xhtml" media-type="application/xhtml+
xml"
 />
<item id="gandhi" href="gandhi.xhtml" media-type="application/xhtml+xml" />
<item id="exotic" href="exotic.xhtml" media-type="application/xhtml+xml" />
<item id="steel" href="steel.xhtml" media-type="application/xhtml+xml" />
<item id="narnia" href="narnia.xhtml" media-type="application/xhtml+xml" />
<item id="repentance-heavens-best-kept-secret"
href="repentance-heavens-best-kep
t-secret.xhtml" media-type="application/xhtml+xml" />
<item id="unashamed" href="unashamed.xhtml" media-type="application/xhtml+xml"
/
>
<item id="silence" href="silence.xhtml" media-type="application/xhtml+xml"
/>
<item id="open" href="open.xhtml" media-type="application/xhtml+xml" />
<item id="hydra" href="hydra.xhtml" media-type="application/xhtml+xml" />
<item id="ordinary" href="ordinary.xhtml" media-type="application/xhtml+xml"
/>
<item id="athanasius" href="athanasius.xhtml" media-type="application/xhtml+
xml"
 />
<item id="philaret" href="philaret.xhtml" media-type="application/xhtml+xml"
/>
<item id="joy" href="joy.xhtml" media-type="application/xhtml+xml" />
<item id="gamechanger" href="gamechanger.xhtml"
media-type="application/xhtml+xm
l" />
<item id="pet" href="pet.xhtml" media-type="application/xhtml+xml" />
<item id="rules-of-engagement" href="rules-of-engagement.xhtml"
media-type="appl
ication/xhtml+xml" />
<item id="grace" href="grace.xhtml" media-type="application/xhtml+xml" />
<item id="no_rights" href="no_rights.xhtml" media-type="application/xhtml+xml"
/
>
<item id="memoirs" href="memoirs.xhtml" media-type="application/xhtml+xml"
/>
<item id="contemplation" href="contemplation.xhtml"
media-type="application/xhtm
l+xml" />
<item id="arena" href="arena.xhtml" media-type="application/xhtml+xml" />
<item id="decisive" href="decisive.xhtml" media-type="application/xhtml+xml"
/>
<item id="maximum" href="maximum.xhtml" media-type="application/xhtml+xml"
/>
<item id="pride" href="pride.xhtml" media-type="application/xhtml+xml" />
<item id="survive" href="survive.xhtml" media-type="application/xhtml+xml"
/>
<item id="find-a-job" href="find-a-job.xhtml" media-type="application/xhtml+
xml"
 />
<item id="russia" href="russia.xhtml" media-type="application/xhtml+xml" />
<item id="spectacles" href="spectacles.xhtml" media-type="application/xhtml+
xml"
 />
<item id="maximos" href="maximos.xhtml" media-type="application/xhtml+xml"
/>
<item id="blackbird" href="blackbird.xhtml" media-type="application/xhtml+xml"
/
>
<item id="profoundly-gifted" href="profoundly-gifted.xhtml"
media-type="applicat
ion/xhtml+xml" />
<item id="zeitgeist" href="zeitgeist.xhtml" media-type="application/xhtml+xml"
/
>
<item id="martial-arts" href="martial-arts.xhtml"
media-type="application/xhtml+
xml" />
<item id="now" href="now.xhtml" media-type="application/xhtml+xml" />
<item id="best" href="best.xhtml" media-type="application/xhtml+xml" />
<item id="death" href="death.xhtml" media-type="application/xhtml+xml" />
<item id="sermon" href="sermon.xhtml" media-type="application/xhtml+xml" />
<item id="desire" href="desire.xhtml" media-type="application/xhtml+xml" />
<item id="icons" href="icons.xhtml" media-type="application/xhtml+xml" />
<item id="transcendent" href="transcendent.xhtml"
media-type="application/xhtml+
xml" />
<item id="halloween" href="halloween.xhtml" media-type="application/xhtml+xml"
/
>
<item id="disruptive-unbranding" href="disruptive-unbranding.xhtml"
media-type="
application/xhtml+xml" />
<item id="humor" href="humor.xhtml" media-type="application/xhtml+xml" />
<item id="pleasure" href="pleasure.xhtml" media-type="application/xhtml+xml"
/>
<item id="hell" href="hell.xhtml" media-type="application/xhtml+xml" />
<item id="God" href="God.xhtml" media-type="application/xhtml+xml" />
<item id="admin" href="admin.xhtml" media-type="application/xhtml+xml" />
<item id="strength" href="strength.xhtml" media-type="application/xhtml+xml"
/>
<item id="mindstorm" href="mindstorm.xhtml" media-type="application/xhtml+xml"
/
>
<item id="modus" href="modus.xhtml" media-type="application/xhtml+xml" />
<item id="lent" href="lent.xhtml" media-type="application/xhtml+xml" />
<item id="treasure" href="treasure.xhtml" media-type="application/xhtml+xml"
/>
<item id="jesus-prayer" href="jesus-prayer.xhtml"
media-type="application/xhtml+
xml" />
<item id="monarchy" href="monarchy.xhtml" media-type="application/xhtml+xml"
/>
<item id="pilgrim" href="pilgrim.xhtml" media-type="application/xhtml+xml"
/>
<item id="punk-eek" href="punk-eek.xhtml" media-type="application/xhtml+xml"
/>
<item id="creation" href="creation.xhtml" media-type="application/xhtml+xml"
/>
<item id="plato" href="plato.xhtml" media-type="application/xhtml+xml" />
<item id="picture" href="picture.xhtml" media-type="application/xhtml+xml"
/>
<item id="avatar" href="avatar.xhtml" media-type="application/xhtml+xml" />
<item id="social-antibodies" href="social-antibodies.xhtml"
media-type="applicat
ion/xhtml+xml" />
<item id="backswing" href="backswing.xhtml" media-type="application/xhtml+xml"
/
>
<item id="singularity" href="singularity.xhtml"
media-type="application/xhtml+xm
l" />
<item id="women" href="women.xhtml" media-type="application/xhtml+xml" />
<item id="fulfillment" href="fulfillment.xhtml"
media-type="application/xhtml+xm
l" />
<item id="dissent" href="dissent.xhtml" media-type="application/xhtml+xml"
/>
<item id="yoke" href="yoke.xhtml" media-type="application/xhtml+xml" />
<item id="spirit" href="spirit.xhtml" media-type="application/xhtml+xml" />
<item id="how-shall-we-live" href="how-shall-we-live.xhtml"
media-type="applicat
ion/xhtml+xml" />
<item id="treasures-in-heaven" href="treasures-in-heaven.xhtml"
media-type="appl
ication/xhtml+xml" />
<item id="attraction" href="attraction.xhtml" media-type="application/xhtml+
xml"
 />
<item id="secret" href="secret.xhtml" media-type="application/xhtml+xml" />
<item id="orthodox-martial-art" href="orthodox-martial-art.xhtml"
media-type="ap
plication/xhtml+xml" />
<item id="work-mystic" href="work-mystic.xhtml"
media-type="application/xhtml+xm
l" />
<item id="life" href="life.xhtml" media-type="application/xhtml+xml" />

    </manifest>
    <spine toc="ncx">
        <itemref idref="doxology" />
<itemref idref="letters" />
<itemref idref="apprentice" />
<itemref idref="providence" />
<itemref idref="father" />
<itemref idref="money" />
<itemref idref="love" />
<itemref idref="meatspace" />
<itemref idref="sacrament" />
<itemref idref="commentary" />
<itemref idref="gandhi" />
<itemref idref="exotic" />
<itemref idref="steel" />
<itemref idref="narnia" />
<itemref idref="repentance-heavens-best-kept-secret" />
<itemref idref="unashamed" />
<itemref idref="silence" />
<itemref idref="open" />
<itemref idref="hydra" />
<itemref idref="ordinary" />
<itemref idref="athanasius" />
<itemref idref="philaret" />
<itemref idref="joy" />
<itemref idref="gamechanger" />
<itemref idref="pet" />
<itemref idref="rules-of-engagement" />
<itemref idref="grace" />
<itemref idref="no_rights" />
<itemref idref="memoirs" />
<itemref idref="contemplation" />
<itemref idref="arena" />
<itemref idref="decisive" />
<itemref idref="maximum" />
<itemref idref="pride" />
<itemref idref="survive" />
<itemref idref="find-a-job" />
<itemref idref="russia" />
<itemref idref="spectacles" />
<itemref idref="maximos" />
<itemref idref="blackbird" />
<itemref idref="profoundly-gifted" />
<itemref idref="zeitgeist" />
<itemref idref="martial-arts" />
<itemref idref="now" />
<itemref idref="best" />
<itemref idref="death" />
<itemref idref="sermon" />
<itemref idref="desire" />
<itemref idref="icons" />
<itemref idref="transcendent" />
<itemref idref="halloween" />
<itemref idref="disruptive-unbranding" />
<itemref idref="humor" />
<itemref idref="pleasure" />
<itemref idref="hell" />
<itemref idref="God" />
<itemref idref="admin" />
<itemref idref="strength" />
<itemref idref="mindstorm" />
<itemref idref="modus" />
<itemref idref="lent" />
<itemref idref="treasure" />
<itemref idref="jesus-prayer" />
<itemref idref="monarchy" />
<itemref idref="pilgrim" />
<itemref idref="punk-eek" />
<itemref idref="creation" />
<itemref idref="plato" />
<itemref idref="picture" />
<itemref idref="avatar" />
<itemref idref="social-antibodies" />
<itemref idref="backswing" />
<itemref idref="singularity" />
<itemref idref="women" />
<itemref idref="fulfillment" />
<itemref idref="dissent" />
<itemref idref="yoke" />
<itemref idref="spirit" />
<itemref idref="how-shall-we-live" />
<itemref idref="treasures-in-heaven" />
<itemref idref="attraction" />
<itemref idref="secret" />
<itemref idref="orthodox-martial-art" />
<itemref idref="work-mystic" />
<itemref idref="life" />

    </spine>
    <guide>
        <reference href="cover.html" type="cover" title="Cover" />
    </guide>
</package>


*title-page.xhtml:*

<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:epub="http://www.idpf.org/2007/ops">
    <head>
        <title>A Wonderful Life</title>
        <style type="text/css">
            body
                {
                text-align: center;
                }
        </style>
    </head>
    <body>
        <h1>A Wonderful Life</h1>
        <h2>by<br />C.J.S. Hayward</h2>
        <p>C.J.S. Hayward Publications, Wheaton</p>
    </body>
</html>


The ePub file, such as I have, is online now at
http://haywardfamily.org/Wisdom%20Literature.epub. It is large because of
the volume of text; its structure though is meant to be almost at a "Hello,
world!" level of simplicity.

-- 
Christos Jonathan Seth Hayward,
An Orthodox Christian author.
Amazon <http://amazon.com/author/cjshayward> - email
<christos.jonathan.hayward@gmail.com> - website <https://cjshayward.com>.
Would you help me get to Mount Athos?
<https://gofundme.com/the-holy-mountain>