xml parsing error at line 2:

xml parsing error at line 2:
Extra content at the end of the document

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<b>Warning</b>: mysqli_query(): MySQL server has gone away in <b>/nfsmnt/hosting1_1/4/1/41003b2a-63c9-4d23-b358-0b23f35bf0d3/mydomain.com/web/wp-includes/wp-db.php</b> on line <b>2030</b><br />
^
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<br />
<b>Warning</b>: mysqli_query(): MySQL server has gone away in <b>/nfsmnt/hosting1_1/4/1/41003b2a-63c9-4d23-b358-0b23f35bf0d3/mydomain.com/web/wp-includes/wp-db.php</b> on line <b>2030</b><br />
<br />
<b>Warning</b>: mysqli_query(): Error reading result set’s header in <b>/nfsmnt/hosting1_1/4/1/41003b2a-63c9-4d23-b358-0b23f35bf0d3/mydomain.com/web/wp-includes/wp-db.php</b> on line <b>2030</b><br />
<br />
<b>Warning</b>: mysqli_query(): MySQL server has gone away in <b>/nfsmnt/hosting1_1/4/1/41003b2a-63c9-4d23-b358-0b23f35bf0d3/mydomain.com/web/wp-includes/wp-db.php</b> on line <b>2030</b><br />
<br />
<b>Warning</b>: mysqli_query(): Error reading result set’s header in <b>/nfsmnt/hosting1_1/4/1/41003b2a-63c9-4d23-b358-0b23f35bf0d3/mydomain.com/web/wp-includes/wp-db.php</b> on line <b>2030</b><br />
<?xml version=”1.0″ encoding=”UTF-8″?>

<!– Sitemap dynamically generated by All in One SEO Pack Pro 3.3.4 by Michael Torbert of Semper Fi Web Design on Sun, 12 Jan 2020 22:48:43 UTC –>
<?xml-stylesheet type=”text/xsl” href=”https://mydomain.com/sitemap.xsl&#8221;?>
<sitemapindex xmlns=”https://www.sitemaps.org/schemas/sitemap/0.9″&gt;