Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/sandwich/public_html/includes/common.inc:2565) in drupal_send_headers() (line 1039 of /home/sandwich/public_html/includes/bootstrap.inc).
• EntityFieldQueryException: Unknown field: endpoints in EntityFieldQuery->fieldCondition() (line 656 of /home/sandwich/public_html/includes/entity.inc).