Httpd.service failed to start

first time installing indico centos 7 and i got stuck Part 10. Launch - httpd.service failed to start

Run systemctl restart uwsgi.service httpd.service indico-celery.service and all only two services (uwsgi.service and indico-celery.service) started: can you help me out why httpd didn’t start so, i can go forward installing indico. do i need install apache itself? i’m not sure what i missing here

Hi, you install Apache during an earlier step of the installation guide. If it fails to start, please check the error log of Apache.

I must had sentix error in indico.conf file . I restarted the httpd.service and it active now . The indico home page open it. Thanks