Osclass site map gernate

facing error to gernate sit map
Warning : fsockopen(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/pakhomec/public_html/oc-includes/osclass/utils.php on line 341

Warning : fsockopen(): unable to connect to search.yahooapis.com:80 (php_network_getaddresses: getaddrinfo failed: Name or service not known) in /home/pakhomec/public_html/oc-includes/osclass/utils.php on line 341

Warning : Cannot modify header information - headers already sent by (output started at /home/pakhomec/public_html/oc-includes/osclass/utils.php:2215) in /home/pakhomec/public_html/oc-includes/osclass/utils.php on line 2220