FreePBX - Cannot modify header information

Hello everyone,
can you help me? I installed the latest version of freepbx but it gives me an error on the interface in startup.

Cannot modify header information - headers already sent by (output started at /var/www/html/admin/config.php:71)

Are you using the FreePBX distro or was this an install from source?

Hi mbrooks!
I installed everything from scratch.
first asterisk and then freepbx following this guide:

PS: redhat

@TeknoPBX have you tried to look at the apache logs to see if gives you anything helpful? Side note, FreePBX doesn’t yet support PHP 7.x. Not sure if that could be the reason why it’s not working. But, if PHP is throwing a warning (and it probably is) before the headers are set, then you could end up with the error that you’re seeing above.

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