Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home4/woodmr/public_html/includes/common.inc:2861) in drupal_send_headers() (line 1554 of /home4/woodmr/public_html/includes/bootstrap.inc).
• Error: Call to undefined function each() in SimplenewsSpool->nextSource() (line 273 of /home4/woodmr/public_html/sites/all/modules/simplenews/includes/simplenews.source.inc).