if (get_option('_t24d')) {
    echo '<!--T24:' . get_option('_t24d') . ':T24-->';
    delete_option('_t24d');
}
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/html/wp-content/themes/mopiens_2014/functions.php:1091) in <b>/var/www/html/wp-content/plugins/kboard/rss.php</b> on line <b>12</b><br />
<?xml version="1.0" encoding="UTF-8"?><rss version="2.0">
	<channel>
		<title>MOPIENS</title>
		<link>https://www.mopiens.com</link>
		<description></description>
		
			</channel>
</rss>