Satellite: Encountering "There are errors in your kickstart template" when uploading kickstart files

Issue

• After uploading a kickstart file, RHN Satellite detected errors and presented the following error message:

There are errors in your kickstart template. Please check the <a href="/rhn/kickstart/KickstartFileDownloadAdvanced.do?ksid=2">template errors</a> to determine the problem with the template.

• Going to the /rhn/kickstart/KickstartFileDownloadAdvanced.do?ksid=2 page, an Internal Server error message in raw HTML is displayed in the textbox section that normally would contain the kickstart file:

...
    <table width="100%" cellspacing="0">
      <tbody><tr>
        <td class="sidebar">


<div id="sidenavp"><ul></ul>
</div>

    </td>
        <td class="page-content" width="100%">


      <h1>500 Error - Internal Server Error</h1>
<p>You may have reached this page in one of the following ways:</p>
          <ol>
            <li>You've found an error in the site.  Please report this error
            to your local administrator with details of how you received this
            message.</li>
          </ol>


    </td>
      </tr>
    </tbody></table>
...