This time, even all plugins deactivated, can not allow 10 roles

Hello, as we already have several blogs with S2member pro 'since 2013), we know how to upgrade to pro and increasing the number of roles.
But this time, we can not.
Each time we add the

<?php define("MEMBERSHIP_LEVELS", 24); /** code in the wp.config file at the begining (properly), we obtain: Warning: Cannot modify header information - headers already sent by (output started at /homepages/16/d552909238/htdocs/no-angoisse/wp-config.php:1) in /homepages/16/d552909238/htdocs/no-angoisse/wp-admin/includes/misc.php on line 1124 Warning: Cannot modify header information - headers already sent by (output started at /homepages/16/d552909238/htdocs/no-angoisse/wp-config.php:1) in /homepages/16/d552909238/htdocs/no-angoisse/wp-includes/pluggable.php on line 1219 This, even - when other plugins deacticated - when S2member deactivated - after uninstalling S2member We can not even delete the define("MEMBERSHIP_LEVELS", 24); ligne code after that, we have to upload wp.config again.

That sounds like a hosting issue.

Does anybody have an answer ?

Hello, thank you for your reply.
If so, how do you resolve that ?

Check the permissions for the files or talk to your host.

Hello,
On 604 and 755 permissions, it is not better.

Any other suggestion ? We also suggest that, as some people like us pay for the pro version, changing level number should be more easy, with a simple button on S2member back-office. Rather than this wp-config editing…

Since we can not obtain any answer, we declare to be very disappointed with that buying.
We did not that a ticket would not be resolved with sharks.