Apache won't start, no error messages indicate what the problem is

I've add a new user trough DA, after that Apache won't start, I've removed the user and it worked again.
So after that I've updated the custombuild, etc etc..

I'm still getting this when I try to start the httpd service

jul 26 23:26:01 host systemd[1]: Starting The Apache HTTP Server...
jul 26 23:26:01 host systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
jul 26 23:26:01 host kill[8302]: kill: cannot find process ""
jul 26 23:26:01 host systemd[1]: httpd.service: control process exited, code=exited status=1
jul 26 23:26:01 host systemd[1]: Failed to start The Apache HTTP Server.
jul 26 23:26:01 host systemd[1]: Unit httpd.service entered failed state.
jul 26 23:26:01 host systemd[1]: httpd.service failed.

Diskspace is not full, http2 is disabled (that was also a message).

I'm using double PHP versions, PHP 5.6 and PHP 7.1

Is there anything I can check to get Apache working again?

Could be SSL

.... cloud be the SSL certificate of DirectAdmin key - cert mismatch

apachekey & apachecert