XML Parsing Error: XML or text declaration not at start of entity

Hi,

I just checked the sitemap and discovered there was an error ? :

XML Parsing Error: XML or text declaration not at start of entity
Location: https://www.syneval.fr/sitemap_index.xml
Line Number 2, Column 1:<?xml version=”1.0″ encoding=”UTF-8″?><?xml-stylesheet type=”text/xsl” href=”//www.syneval.fr/main-sitemap.xsl”?>