Specified web server not found in /etc/httpd/conf/httpd.conf
This might be because the server has no entry in httpd.conf, or
because the entry in httpd.conf is mis-configured, or
because of a DNS mis-match where your browser and this server do not have consistent DNS records. If the server thinks that the server name does not map to one of its addresses, then it will not respond to web queries for that name. If DNS entries have been recently changed (and changed properly) then the changes should propagate within 24 hours.