Hello community!

I've been recieving the above referenced error on our site.

The following is the code for the file in question:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:msxml="urn:schemas-microsoft-com:xslt"
xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets"
exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets ">

<xsl:output method="xml" omit-xml-declaration="yes"/>

<xsl:param name="currentPage"/>

<xsl:template match="/">

<xsl:variable name="feeditems" select="document('../App_Data/FeedCache/insideval.xml')//item" />

<xsl:if test="count($feeditems) &gt; 0">
<div class="newsList">
<xsl:for-each select="$feeditems">
<xsl:if test="position() &lt;= 12">
<li>
<a href="{./link}" target="_blank"><xsl:value-of select="./title" /></a>
<small><xsl:value-of select="./pubDate" /></small>
<p><xsl:value-of select="./description"/></p>
</li>
</xsl:if>
</xsl:for-each>
</div>
</xsl:if>

</xsl:template>

</xsl:stylesheet>

Any ideas would be greatly appreciated! As a side note, i didnt write this code nor am I even remotely familiar with coding. Please speak slowly and no big words!

Thank you very much!