Error message

• Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/includes/common.inc:2797) in drupal_send_headers() (line 1499 of /var/www/html/includes/bootstrap.inc).
• Error: Call to undefined function Ooyala\curl_init() in Ooyala\OoyalaApiV2->do_get() (line 227 of /var/www/html/sites/all/modules/contrib/ooyala/includes/OoyalaApiV2.php).