In our /etc/httpd/conf/httpd.conf lets see if we have the following lines on it.
Uncomment them or add them.
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LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_balancer_module modules/mod_proxy_balancer.so LoadModule proxy_http_module modules/mod_proxy_http.so # Uncomment these to proxy FTP or HTTPS #LoadModule proxy_ftp_module modules/mod_proxy_ftp.so #LoadModule proxy_connect_module modules/mod_proxy_connect.so