Im setting up a test site and when i try to install i keep getting this error page:

Warning: Cannot modify header information - headers already sent by (output started at /home/content/s/t/u/store/html/TEST/includes/classes/db/mysql/query_factory.php:913) in /home/content/s/t/u/store/html/TEST/zc_install/includes/modules/pages/inspect/header_php.php on line 468

anyone know how to resolve this issue?