Declare xmlns again to deal with new com.sun.org.apache.xalan.internal.xsltc.TransletException

server/xml-validation/xsl/addcitation.xsl

@@ -206,7 +206,7 @@
   <xsl:template name="epmc-license">
     <license>      
       <ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://europepmc.org/downloads/openaccess</ali:license_ref>
-      <license-p>This preprint is made available via the <ext-link ext-link-type="uri" xlink:href="https://europepmc.org/downloads/openaccess">Europe PMC open access subset</ext-link>, for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original preprint source.</license-p>
+      <license-p>This preprint is made available via the <ext-link ext-link-type="uri" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://europepmc.org/downloads/openaccess">Europe PMC open access subset</ext-link>, for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original preprint source.</license-p>
     </license>
   </xsl:template>