cPanel version get upgraded to 11 most common problem many peoples are facing with starting Apache on new installation.
The error reported is :

Invalid command ‘BytesLog‘, perhaps mis-spelled or defined by a module not included in the server configuration
/usr/local/apache/bin/apachectl start: httpd could not be started

To fix this mod_log_bytes.c needs to be re-compiled.

cd /usr/local/cpanel/apache
/usr/local/apache/bin/apxs -iac mod_log_bytes.c