Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/a13fa0d0e/ourdsource.in/includes/common.inc:2820) in drupal_send_headers() (line 1501 of /home/a13fa0d0e/ourdsource.in/includes/bootstrap.inc).
• PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'dsource_our_drupal.queue' doesn't exist: SELECT data, item_id FROM {queue} q WHERE expire = 0 AND name = :name ORDER BY created, item_id ASC LIMIT 0, 1; Array ( [:name] => recommender_cron_process ) in SystemQueue->claimItem() (line 234 of /home/a13fa0d0e/ourdsource.in/modules/system/system.queue.inc).