FOP XSL-FO Internal page anchor link URI problems - xslt

Question

Morning folks!
So I am currently working on an FOP solution for a project, the end goal of which is basically to allow me to print onto a medium with the second iteration of the same information upside down, a feature which is not possible in Access 2007.
Everything is working swimmingly, and I can get the FOP to parse when I duplicate the code for the front side and use it for the back side.
However, when I try to use the parameter, I am getting an error I simply don't understand from the FOP terminal, having spent the better part of 4-5 hours trying to get my head around it. Code and error to follow.
<?xml version="1.0" encoding="utf-8"?>
<!-- WARNING - THIS TEMPLATE IS FOR Z FOLD CANON STOCK - DOUBLE SIDED -->
<!-- In order to covert CM to pixels, multiply the CM by 37.7952755905511, and round to two decimal places. It may be easier to use a spreadsheet to do this if you are editing multiple values -->
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:template match="/">
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
<fo:layout-master-set>
<!-- EDIT THIS ROW TO CHANGE THE SIZE OF THE PAGE - AKA SET THIS TO THE SIZE OF THE MEDIUM YOU ARE PRINTING TO - CONVERTED TO PIXELS-->
<fo:simple-page-master master-name="simple" page-height="740.787px" page-width="317.480px">
<!-- IGNORE EVERYTHING BETWEEN HERE-->
<fo:region-body/>
</fo:simple-page-master>
</fo:layout-master-set>
<fo:page-sequence master-reference="simple">
<fo:flow flow-name="xsl-region-body">
<xsl:for-each select="//Person">
<fo:block>
<fo:instream-foreign-object>
<!--<svg xmlns="http://www.w3.org/2000/svg">-->
<!-- AND HERE-->
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="370.4" height="634.96">
<g class="mirrorpage">
<rect style= "fill:none; stroke: black" width="370.394" height="317.480"/>
<text x="37.8" y="122.83" style="text-anchor:start;" font-family="'ChevinLight'">
<tspan font-size="20">
Firstname
</tspan>
<tspan font-size="20">
Lastname
</tspan>
</text>
<text style="text-anchor:start;" x="37.8" y="150" font-family="'ChevinLight'">
<tspan font-size="20">
Company Name
</tspan>
</text>
<xsl:variable name="code" select="Code"/>
<image xlink:href="LINK REDACTED" x="37.8" y="190" height="50" width="50"/>
<image xlink:href="LINK REDACTED" x="250" y="200" height="100"width="100"/>
</g>
<use href= "#mirrorpage" transform="translate (370.394 634.96) scale (-1 -1)"/>
</svg>
</fo:instream-foreign-object>
</fo:block>
</xsl:for-each>
</fo:flow>
</fo:page-sequence>
</fo:root>
</xsl:template>
</xsl:stylesheet>
The error I am then receiving when I try to parse this is as follows:
[ERROR] svg graphic could not be built: file:/C:/Users/Events/Desktop/Angledtext/BadgePrinting/PDF/:-1
The URI '' specified on the element is invalid.
From my (limited) understanding, there is an issue with the parsing of the "#" in the use line. I have tried to research URI properties but I have to be honest, I am completely lost.
Any help, or even a pointer to some relevant material I can read would be greatly appreciated.
Thanks