To ensure that your changes are correct, strongly recommended that you use

apachectl -t

to checck your configuration changes for errors. After this passes, you may need to reload Apache to make sure your changes are applied by running the command

sudo service httpd restart

To avoid CORS errors, following configs needs to be added to fully CORS-enable an Apache web server at the end of /etc/httpd/conf/httpd.conf

    <IfModule mod_headers.c>
           Header set Access-Control-Allow-Origin "*"
           Header set Access-Control-Allow-Headers "*"
           Header set Access-Control-Allow-Methods "*"
    </IfModule>