I'm getting the error define('PERCH_SECURITY_HEADERS', false); when trying to login to my Perch account.
There are errors in the PHP log like this:-
[06-Jun-2020 07:59:52 Europe/London] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/hypnot/public_html/perch/config/config.php:26) in /home/hypnot/public_html/perch/core/lib/PerchUtil.class.php on line 233
Nothing has been changed by me and my web host denies messing anything up. Can anyone help please?