Fehlermeldung

• Warning: Cannot modify header information - headers already sent by (output started at /homepages/37/d114405134/htdocs/DrupalSeite/includes/common.inc:2861) in drupal_send_headers() (Zeile 1554 von includes/bootstrap.inc).
• Error: Undefined constant "DRUPAL_CRON_DETAILED_LOGGING" in drupal_cron_run() (Zeile 5554 von includes/common.inc).