Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/busstop1/public_html/includes/bootstrap.inc:1640) in drupal_send_headers() (line 1499 of /home/busstop1/public_html/includes/bootstrap.inc).
• Error: Class 'FeedsHTTPCache' not found in feeds_cron() (line 82 of /home/busstop1/public_html/sites/all/modules/feeds/feeds.module).